Fluent Adapt Menu

Chapter5.Adapt Menu This chapter provides the information about all the submenu’s listed under Adapt menu item in the FLUENT GUI.The menu items described in this chapter are:•Section5.1:Adapt/Boundary...
•Section5.2:Adapt/Gradient...
•Section5.3:Adapt/Iso-Value...
•Section5.4:Adapt/Region...
•Section5.5:Adapt/Volume...
•Section5.6:Adapt/Yplus/Ystar...
•Section5.7:Adapt/Manage...
•Section5.8:Adapt/Controls...
•Section5.9:Adapt/Geometry...
•Section5.10:Adapt/Display Options...
•Section5.11:Adapt/Smooth/Swap...
5.1Adapt/Boundary...
The Adapt/Boundary...menu item opens the Boundary Adaption panel.
Boundary Adaption Panel
The Boundary Adaption panel allows you to mark or refine boundary cells on selected boundary zones.
Adapt Menu
Panel5.1.1:Boundary Adaption
Controls
Options contains three different methods for boundary adaption:
Cell Distance enables adaption based on a cell’s distance from the boundary,
measured in number of cells.
Normal Distance enables adaption based on a cell’s normal distance from the
boundary.
Volume Distance enables adaption based on a target boundary volume and growth
factor.
Contour...opens the Contours panel(see panel
Manage...opens the Manage Adaption Registers panel(see panel5.7.1),which allows you to display and manipulate adaption registers that are generated using the Mark
command.
Controls...opens the Grid Adaption Controls panel(see panel5.8.1)which allows you to control certain aspects of the adaption process.
Number of Cells sets the maximum boundary cell distance for adaption(used with the Cell Distance option.
Distance Threshold sets the maximum normal distance for adaption(used with the Normal Distance option).
Boundary Volume sets the boundary volume V boundary in Equation??.
Growth Factor sets the exponential growth factorαin Equation??(used with the Volume Distance option).
5.2Adapt/Gradient...
Boundary Zones contains a selectable list of zones on which you can refine.The bound-ary cells associated with the zones that you select will be refined.
Adapt refines the cells with edges/faces on the zones selected in the Boundary Zones list.
Mark marks the boundary cells associated with the zones selected in the Boundary Zones list for refinement.
5.2Adapt/Gradient...
The Adapt/Gradient...menu item opens the Gradient Adaption panel.
Gradient Adaption Panel
The Gradient Adaption panel allows you to mark cells or adapt the grid based on the gradient(or curvature)of the selectedfield variables.
Panel5.2.1:Gradient Adaption
Controls
Options contains the check buttons that toggle the ability to mark and/or adapt cells for refinement or coarsening.
Adapt Menu
Refine toggles the ability to refine or mark cells for refinement.
Coarsen toggles the ability to coarsen or mark cells for coarsening(available in
2D and axisymmetric cases).
Norm per Zone enables normalization per zone.
Contour...opens the Contours panel(see panel
Manage...opens the Manage Adaption Registers panel(see panel5.7.1),which allows you to display and manipulate adaption registers that are generated using the Mark
command.
Controls...opens the Grid Adaption Controls panel(see panel5.8.1)panel,which allows you to control certain aspects of the adaption process.
Method contains options for specifying the criterion for adaption.
Curvature specifies the use of the second gradient of afield variable for adaption.
This approach is recommended for problems with smooth solutions.
Gradient specifies the use of thefirst gradient of afield variable for adaption.
This approach is recommended for problems with strong shocks.
Iso-Value specifies the use of iso-value approach,that uses the requiredfield
variable f,are used to control the adaption.This approach is recommended
for problems where derivatives are not helpful.
Normalization contains the options available for normalization.
Standard specifies that the gradient or curvature is not normalized.
Scale specifies that the gradient or curvature is scaled by its average value in
the domain.
Normalize specifies that the gradient or curvature is scaled by its maximum value
in the domain(i.e.the gradient or curvature is bounded by[0,1]).
Dynamic contains options to specify dynamic gradient adaption.
Dynamic enables dynamic gradient adaption.
Interval allows you to specify the number of iterations or time-steps between
two consecutive automatic mesh adaptions,depending on whether you are
performing a steady-state or a time-dependent solution,and on which solver
you are using.
Gradients Of contains a list of thefield variables that can be used in the gradient adaption function.
Min/Max displays the minimum and maximum cell values of the gradient adaption function based on the selected quantity.
5.3Adapt/Iso-Value...
Coarsen Threshold designates the threshold values for coarsening the grid.Cells with adaption function values below the Coarsen Threshold will be marked for coarsening.
Refine Threshold designates the threshold values for refining the grid.Cells with adap-tion function values above the Refine Threshold will be marked for refinement.
Adapt adapts the grid based on the gradients of the selected scalar quantity,the coarsening and refining toggle buttons and thresholds,and the adaption limits.
Mark marks cells to be refined and/or coarsened based on the gradients of the selected quantity and the coarsening and refining toggle buttons and thresholds.This com-
mand produces an adaption register.
Compute computes the minimum and maximum cell values of the gradient adaption function with the selected scalar quantity.The values are displayed in the Min and
Max real numberfields.
5.3Adapt/Iso-Value...
The Adapt/Iso-Value...menu item opens the Iso-Value Adaption panel.
Iso-Value Adaption Panel
The Iso-Value Adaption panel allows you to mark or refine cells inside or outside a specified range of a selected scalar function.
Panel5.3.1:Iso-Value Adaption
Adapt Menu
Controls
Options contains radio buttons that control whether the cells inside or outside the isovalue range are marked for refinement.
Inside enables the marking of cells with values between Iso-Min and Iso-Max.
Outside enables the marking of cells with values less than Iso-Min or greater than
Iso-Max.
Iso-Values Of contains a list from which you can select the solution variable to be used in the isovalue adaption function.
Min/Max displays the minimum and maximum cell values of the selectedfield variable.
The real numberfield values are not editable;they are purely informational.
Iso-Min defines the minimum isovalue threshold.
Iso-Max defines the maximum isovalue threshold.
Manage...opens the Manage Adaption Registers panel(see panel5.7.1),which allows you to display and manipulate adaption registers that are generated using the Mark
command.
Controls...opens the Grid Adaption Controls panel(see panel5.8.1),which allows you to control certain aspects of the adaption process.
Adapt adapts the grid based on the isovalues of the selected solution variable,the isovalue ranges,and the Inside/Outside option.
Mark marks cells to be refined based on the isovalues of the selected quantity,the isovalue ranges,and the Inside/Outside option.
Compute computes the minimum and maximum cell values of the selected solution variable and displays them in the Min and Max real numberfields.
5.4Adapt/Region...
The Adapt/Region...menu item opens the Region Adaption panel.
Region Adaption Panel
The Region Adaption panel allows you to mark or refine cells inside or outside a specified region defined by text or mouse input.
5.4Adapt/Region...
Panel5.4.1:Region Adaption
Controls
Options contains radio buttons that control whether the cells inside or outside the region are marked for refinement.
Inside enables the marking of cells with centroids that are within the region.
Outside enables the marking of cells with centroids that are outside the region.
Shapes contains radio buttons that control the type of region.
Hex/Quad defines a hexahedral region in3D or a rectangular region in2D.The
appropriate button will appear for the solver you are using.
Sphere/Circle defines a spherical region in3D or a circular region in2D.The
appropriate button will appear for the solver you are using.
Cylinder defines a cylindrical region in3D or a rectangular region in2D.
Manage...opens the Manage Adaption Registers panel(see panel5.7.1),which allows you to display and manipulate adaption registers that are generated using the Mark command.
Controls...opens the Grid Adaption Controls panel(see panel5.8.1),which allows you to control certain aspects of the adaption process.
Input Coordinates defines the extent of the selected region.The appearance of this box changes depending on the type of region selected.
Adapt Menu
If the region selected is a hexahedron or quadrilateral,you will input the minimum
and maximum coordinates defining the box.(The Radius real numberfield will not
be active.)
Xminimum,Yminimum,Zminimum define the coordinates of the minimum point
defining the hexahedron or rectangle.For quadrilaterals,the Zminimum real
entryfield will not be active.
Xmaximum,Ymaximum,Zmaximum define the coordinates of the maximum point
defining the hexahedron or rectangle.For quadrilaterals,the Zmaximum real
entryfield will not be active.
If the region selected is a sphere or circle,you will input the coordinates of the
sphere’s center and its radius.(The maximum coordinate real numberfields will
not be active.)
Xcenter,Ycenter,Zcenter are the coordinates of the centroid of the sphere or circle.
For circles,the Zcenter real entryfield will not be active.
Radius is the radius of the sphere or circle.
If the region selected is a cylinder,you will input the minimum and maximum
coordinates defining the cylinder axis,as well as the radius of the cylinder.
X-Axis Min,Y-Axis Min,Z-Axis Min define the coordinates of the minimum point
defining the cylinder axis.For2D cases,the Z-Axis Min real entryfield will
not be active.
X-Axis Max,Y-Axis Max,Z-Axis Max define the coordinates of the maximum point
defining the cylinder axis.For2D cases,the Z-Axis Max real entryfield will
not be active.
Radius is the radius of the cylinder.(In2D,this will be the width of the resulting
rectangle.)
Select Points With Mouse activates selection of input coordinates with the mouse.If one of the mouse buttons is defined as a mouse probe,you may select the input
coordinates from a display of the grid or solutionfield.After you select the points,
the values will be loaded automatically into the appropriate real numberfield.If
needed,you can edit these values before marking or adapting.The order of input
for defining a hexahedron(rectangle)is insignificant,but the order of input for the
sphere(circle)has significance.First,you select the location of the centroid.Then
you select a point that lies on the sphere,i.e.,a point that is one radius away from
the centroid.
Adapt adapts the grid based on the region defined and the in/out option.
Mark marks the cells to be refined based on the region defined and the in/out option.
This command produces an adaption register.
5.5Adapt/Volume...
5.5Adapt/Volume...
The Adapt/Volume...menu item opens the Volume Adaption panel.
Volume Adaption Panel
The Volume Adaption panel allows you to mark or refine cells based on cell volume or change in cell volume.
Panel5.5.1:Volume Adaption
Controls
Options contains the radio buttons that toggle between marking and/or refining based on volume magnitude or volume change.
Magnitude enables the marking/refining of cells based on volume magnitude.
Change enables the marking/refining of cells based on the change in volume.
Min displays the minimum value of cell volume or cell volume change in the grid.This value is not editable.
Max displays the maximum value of cell volume or cell volume change in the grid.
This value is not editable.
Max Volume defines the threshold value for marking/refining the grid based on volume magnitude.Cells that have volumes greater than the threshold are marked for
refinement.
Max Volume Change defines the threshold value for marking/refining the grid based on the change in volume.Cells with volume changes that are greater than the
threshold value are marked for refinement.
Adapt Menu
Manage...opens the Manage Adaption Registers panel(see panel5.7.1),which allows you to display and manipulate adaption registers that are generated using the Mark
command.
Controls...opens the Grid Adaption Controls panel(see panel5.8.1),which allows you to control certain aspects of the adaption process.
Adapt refines the grid based on either the maximum volume or the volume change, and the adaption limits.
Mark marks cells to be refined based on either the maximum volume or the volume change.This command produces an adaption register.
Compute calculates the minimum and maximum cell volume or cell volume change and displays them in the Min and Max real numberfields.
5.6Adapt/Yplus/Ystar...
The Adapt/Yplus/Ystar...menu item opens the Yplus/Ystar Adaption panel.
Yplus/Ystar Adaption Panel
The Yplus/Ystar Adaption panel allows you to mark or adapt boundary cells on specified wall zones based on the non-dimensional y+or y∗parameter.
Panel5.6.1:Yplus/Ystar Adaption
5.6Adapt/Yplus/Ystar...
Controls
Options contains the check buttons that toggle the ability to mark and/or adapt cells for refinement or coarsening.
Refine toggles the ability to refine cells or mark cells for refinement.
Coarsen toggles the ability to coarsen cells or mark cells for coarsening.
Type contains the check buttons that enable adaption based on y+or y∗.
Yplus enables y+adaption.
Ystar enables y∗adaption.
Wall Zones contains a selectable list of active wall zones.Boundary cells associated with the wall zones you select will be marked or adapted based on the options, thresholds,and limitations applied in the panel.
Min/Max displays the minimum and maximum cell values of y+or y∗for all cells associated with viscous wall zones.Note that these values are independent of the wall zones selected.The real numberfield values are not editable;they are purely informational.
Min Allowed designates the threshold value for coarsening the grid.Cells with y+or y∗values below the minimum threshold will be marked for coarsening.
Max Allowed designates the threshold value for refining the grid.Cells with y+or y∗values above the maximum threshold will be marked for refinement. Manage...opens the Manage Adaption Registers panel(see panel5.7.1),which allows you to display and manipulate adaption registers that are generated using the Mark command.
Controls...opens the Grid Adaption Controls panel(see panel5.8.1),which allows you to control certain aspects of the adaption process.
Adapt adapts the grid based the coarsening and refining toggle buttons,the wall zones selected,the minimum and maximum y+or y∗allowed,and the adaption limits. Mark marks cells to be refined and/or coarsened based on the wall zones selected and the minimum and maximum y+or y∗allowed in the grid.This command produces an adaption register.
Compute computes the minimum and maximum values of y+or y∗on all cells on viscous walls and displays them in the Min and Max real numberfields.Note that these are the extremes for the y+or y∗values of every cell on a viscous wall,not just the cells associated with the selected zones.
Adapt Menu
5.7Adapt/Manage...
The Adapt/Manage...menu item opens the Manage Adaption Registers panel.
Manage Adaption Registers Panel
The Manage Adaption Registers panel provides an interactive mechanism for creating, destroying,and displaying functions for grid adaption.
Panel5.7.1:Manage Adaption Registers
Controls
Register Actions contains operations applied to adaption or mask registers.
Change Type toggles the register between adaption and mask types.Adaption
registers are used to initiate refining or coarsening of the grid.Typically,
mask registers are combined with adaption registers to control the scope of
the adaption process.
Combine combines the selected adaption registers to create a hybrid adaption
function.In some instances,three new registers may be created:a combination
of the adaption registers,a combination of the mask registers,and then a
combination of the two combined registers.
Delete permanently discards the selected registers.
Mark Actions contains operations applied to the cell markings defined in an adaption or mask register.
5.8Adapt/Controls...
Exchange modifies the cell markings in the following manner:all cells origi-
nally marked for refinement are marked for coarsening,and all cells originally
marked for coarsening are marked for refinement.
Invert modifies all the cell markings in a mask register in the following manner:
all cells that were originally marked as ACTIVE are marked INACTIVE,and
all cells originally marked as INACTIVE are marked ACTIVE.Note that this
action can only be applied to mask registers.
Limit applies the adaption volume limits to the selected registers.
Fill marks for coarsening all cells in the adaption register that are not marked
for refinement.
Registers contains a list from which you can select the current adaption and mask registers.Many of the actions in the panel are activated or deactivated based on
the number and/or type of adaption registers selected.
Register Info provides the name,ID,number of cells marked for refinement and coars-ening,and the type of the most recently selected or deselected register.
Options...opens the Adaption Display Options panel(see panel5.10.1).
Controls...opens the Grid Adaption Controls panel(see panel5.8.1),which allows you to control certain aspects of the adaption process.
Adapt adapts the grid based on the selected adaption register.The Adapt button is deactivated if more than one adaption register is selected.Adaption functions
composed of combinations of adaption registers can be produced using commands
in the Register Actions and Mark Actions boxes.
Display displays the cells marked for adaption in the selected adaption register in the active graphics window.The Display button is deactivated if more than one
adaption register is selected.Adaption functions composed of combinations of
adaption registers can be produced using commands in the Register Actions and
Mark Actions boxes.
5.8Adapt/Controls...
The Adapt/Controls...menu item opens the Grid Adaption Controls panel.
Grid Adaption Controls Panel
The Grid Adaption Controls panel allows you to set limits on the minimum cell size,the minimum and maximum number of cells,and the cell types that can be adapted.In addition,it allows you to vary the volume weighting of the gradient adaption function.
Adapt Menu
Panel5.8.1:Grid Adaption Controls
Controls
Type contains check buttons that control the type of adaption that is performed.
Hanging enables hanging node adaption(the default).
Conformal enables conformal adaption.
Options contains check buttons that control the manner in which the grid can be adapted.
Refine toggles grid adaption by adding points.
Coarsen toggles grid adaption by removing points.
Zones contains a list of cell zones from which you can select the zones in which to perform adaption(or marking).By default,all cell zones are selected.
Min Cell Volume restricts the size of the cell that is considered for refinement.Even if the cell is marked for refinement,it will not be refined if its cell volume is less than
this threshold value.
Min#of Cells specifies the minimum number of cells required in the grid.
Max#of Cells limits the total number of cells allowed in the grid.A value of zero places no limits on the number of cells.
Max Level of Refine specifies the maximum level of refinement for the cells.
5.9Adapt/Geometry...
Volume Weight controls the volume weighting in the gradient adaption function.Valid values are between0and1:0for no volume weighting and1for full volume
weighting.
Node Removal Flags contains check buttons that control the node removal permissions associated with the conformal coarsening process.These items will appear only for
2D problems when Conformal is the selected adaption Type and Coarsen is activated.
Boundary-Original toggles the permission to remove original nodes on boundary
zones.
Internal-Original toggles the permission to remove original nodes on interior
zones.
Periodic-Original toggles the permission to remove original nodes on periodic
zones.
Boundary-Refined toggles the permission to remove nodes generated by refine-
ment on boundary zones.
Internal-Refined toggles the permission to remove nodes generated by refine-
ment on interior zones.
Periodic-Refined toggles the permission to remove nodes generated by refine-
ment on periodic zones.
5.9Adapt/Geometry...
The Adapt/Geometry...menu item opens the Geometry Based Adaption panel.
Geometry Based Adaption Panel
Controls
Reconstruct Geometry enables geometry based adaption.
The panel will expand showing relevant parameters.
Wall Zones contains the list of zones in the geometry.
You can select each wall zone separately and specify different parameters for
each.
Controls contains the parameters for controlling the geometry based adaption.
Disable Geometry Based Adaption For This Zone disables the geometry based adap-
tion for the zone selected under Wall Zones.
Levels of Projection Propagation indicates the number of layers of the nodes you
want to project.
Adapt Menu
Panel5.9.1:Geometry Based Adaption
Specify Direction of Projection allows you to specify the directions in which you
want to project the nodes.
This will activate the parameters X,Y and Z.If you want node projec-
tion in the X direction,specify X=1.If you do not activate this option,
the node projection will take place at the nearest point.
Background Mesh allows you to access the zones the surface mesh as a back-
ground mesh.This will project the nodes based on the background mesh and
reconstruct the geometry more accurately.
5.10Adapt/Display Options...
The Adapt/Display Options...menu item opens the Adaption Display Options panel.
Adaption Display Options Panel
The Adaption Display Options panel allows you to customize the display of adaption or mask registers.
Controls
Options contains check buttons that control the drawing of the grid and the type of graphical tool used to displayflagged cells.
5.10Adapt/Display Options...
Panel5.10.1:Adaption Display Options
Draw Grid toggles the ability to draw the grid with the adaption display.This command opens the Grid Display panel(see panel
Filled toggles the solid shading of the cell wireframe.
Refine contains options related to the display of cells marked for refinement.
Wireframe toggles the display of the cell wireframe for cellsflagged for refine-ment.
Marker toggles the display of the cell marker for cellsflagged for refinement.
Color is a drop-down list of colors for the wireframe or marker for the cells marked for refinement.
Size is a real number entry for the size of the refine cell marker.A symbol of size1.0is3.0%of the height of the display screen.
Symbol is a drop-down list of symbols that can be used for the refine cell marker. Coarsen contains options related to the display of cells marked for refinement.
Wireframe toggles the display of the cell wireframe for cellsflagged for coarsen-ing.
Marker toggles the display of the cell marker for cellsflagged for coarsening.
Color is a drop-down list of colors for the wireframe or marker for the cells marked for coarsening.
Size is a real number entry for the size of the coarsen cell marker.A symbol of size1.0is3.0%of the height of the display screen.
Symbol is a drop-down list of symbols that can be used for the coarsen cell marker.
Adapt Menu
5.11Adapt/Smooth/Swap...
The Adapt/Smooth/Swap...menu item opens the Smooth/Swap Grid panel.
Smooth/Swap Grid Panel
The Smooth/Swap Grid panel controls smoothing and face swapping of the numerical mesh.
Panel5.11.1:Smooth/Swap Grid
Controls
Smooth contains parameters associated with smoothing the grid.
Method indicates whether the Laplacian or the skewness-based smoothing method
is to be used.Select laplace or skewness from the drop-down list.
Relaxation Factor(for Laplacian smoothing)sets the factor by which to multiply
the computed position increment for the node.The lower the factor,the more
reduction in node movement.Thisfield appears when laplace is selected as
the smoothing method.
Minimum Skewness(for skewness-based smoothing)sets the minimum cell skew-
ness value for which node smoothing will be attempted.FLUENT will try to
move interior nodes to improve the skewness of cells with skewness greater
than this value.By default,Minimum Skewness is set to0.8for3D or0.4
for2D.The Minimum Skewnessfield appears when skewness is selected as the
smoothing method.
Number of Iterations defines the number of successive smoothing sweeps per-
formed on the grid.
5.11Adapt/Smooth/Swap...
Swap Info provides information on the most recent face-swapping operation.
Number Swapped displays the number of faces that were swapped based on the Delaunay circle test.
Number Visited displays the total number of faces that were visited and tested for possible face swapping.
Smooth initiates the desired number of smoothing iterations.
Swap exchanges the faces of cells for which the circle test is not satisfied.
Face swapping is applicable only to grids with triangular or tetrahedral cells.
Adapt Menu。