fluent计算错误汇总（fluent计算错误汇总）

fluent 计算错误汇总（fluent 计算错误汇总）
Fluent calculation error summary
1..Fluent cannot display images
When you run fluent, you check grid after importing case, and this error always occurs when you display grid
Error, message, from, graphics, function, Update_Display:
Unable, to, Set, OpenGL, Rendering, Context
Error:, FLUENT, received, a, fatal, signal (SEGMENTATION, VIOLATION)
Error, Object: ()
Terms of settlement：
Right click the shortcut, and put the target by
x:fluent.incntbinntx86fluent.exe
Change to: x:fluent.incntbinntx86fluent.exe, 2D, -driver, MSW
If there is a three-dimensional, you can build a shortcut to change:
X:fluent.incntbinntx86fluent.exe 3D -driver MSW
This can be called directly. If not for the above reasons, it may also conflict with other software, such as MATLAB, which
will make fluent unable to display images.
Q1:GAMBIT cannot run after installation. The error message is "unable find Exceed X Server""
A. GAMBIT needs to be loaded with EXCEED.
Gambit run: first run the command prompt, enter gambit, enter
Fluent: run directly in the beginning - Fluent Inc program
Q2:Fluent cannot run after installation. Error message is "unable find/open license.dat""
A., FLUENT, and GAMBIT need to copy the corresponding license.dat files to the FLUENT.INC/license directory
Q3: error message: when running gambit, the prompt could not find the gambit file
The default setup settings are recommended for A., FLUENT, and GAMBIT,
After you have finished installing GAMBIT, set the environment variable,
Set the way "- INC-Set Environment FLUENT program start"
In addition, setting up the environment variable needs to be restarted, otherwise you will still be prompted for an environment variable.
What does Q4: need to pay attention to when using Fluent and Gambit?
A. installed FLUENT and GAMBIT, it is best to set the user default path
Recommend setting methods to build a directory in a non system partition, such as d:\users
A) Win2K users in the control panel - users and passwords - Advanced - advanced, using the fluent user's configuration file
Modify the local path to d:\users, restart the user, run the command prompt, and check whether the user path is modified
B) XP user, send the command prompt to the desktop shortcut, and right-click the command prompt
In the shortcut start position, add D:\users and reset the check
Q5:Gambit operation failed. Error message "IDENTIFIER" "default_ Server""
The default file for A. gambit has been opened. To the user's default directory, delete files such as default_id.*
Q6:Gambit running failed, Gambit running interface flash, no error information,
Only the exceed is started and a directory of gambit.xxxx is
randomly generated in the directory where gambit is located
A. because of the error of the gambit program, there are two directories in the fluent folder with gambit,
What you need to do correctly is the gambit.exe in fluent inc/ntbin/ntx86,
Instead of the gambit.exe under the gambit folder
Q7: installed FLUENT6.1, this problem occurs at runtime: Error:, sopenoutputfile:, unable, to, open, file, for, output Error Object: "c:\temp\kill-fluent1684""
A. to build a temp directory in C, two errors can be resolved. What about iterative divergence in Q8:Fluent computation?
A. FLUENT the number of iterative calculation start Courant is best to use a smaller, otherwise easily lead to iterative divergence.
To modify Slovecontrolssolution, modify Courant Number
The default value is 1, beginning with less experience, such as 0.01, and then gradually increasing,
Experienced colleagues decide for themselves
Or, FLUENT modify the limit of the iterative value, SlovecontrolsLimits
Decide on what you calculate
Q9:fortran program reported wrong stack overflow how to do?
The general FORTRAN compiler defaults to "allocatable array" placed in the heap, and "automatic array" placed on the stack.
The default setting for the stack is generally 1048576.
Array out of bounds, prompt stack overflow in Visual Fortran. Compiler under UNIX platform such as F77
It's usually core dump.
Now change the default settings of the stack.
In VF, you can run link or editbin commands in command line mode.
Question 1:Gambit why can't it be started?
There may be 3 reasons
1.exceed problem. Running Gambit appears Using X_DEVICE.... Exceed installation is no problem, if not, please re install exceed, install the exceed best custom installation, select only Xserver, and nothing else, so the best;
2.License problem. Into the command line, set up the
environment variables, run Gambit, if you display License Error, that is the License problem, and re Copy License file to the license directory under the installation directory;
3..Lok file problem. The establishment of Defaul.dbs default Gambit starts, if there are default.lok files, the gambit cannot start, delete the file, the.Lok file is locked in this project, please see the detailed description of the Gambit help;
4. is also a License problem, but even if the copy License file is not resolved again, you can then try to modify the system time.
Question 2: how to improve convergence?
1. ensure that the mesh is fine enough
2., maybe your boundary conditions are too bad, you can try to change the boundary conditions to be more conventional. After calculating the convergence, gradually increase the value of the boundary variables until you meet the requirements
3. adjust the relaxation factor appropriately and choose the solution that best fits the model you are using
Question 3:Fluent how is the pressure in the pressure inlet and the pressure outlet boundary set?
First of all, we should make clear the two concepts:
Total pressure = static pressure + dynamic pressure (for incompressible flow)
Absolute pressure gauge (gauge = pressure) + reference pressure (operating pressure)
Set the pressure boundary in Fluent is the gauge set in pressure-inlet is the total pressure; pressure-outlet set is static (Note: This contains not head pressure Hydrostatic Head).
Question 4: what is static pressure, total pressure and dynamic pressure?
Hydrostatic pressure, dynamic pressure, and total pressure are the concepts of fluid mechanics (total pressure, strictly speaking aerodynamics).
1. hydrostatic pressure is the pressure at which the fluid moves at the same speed. The pressure measured by the pressure is due to the motion of molecules.
The 2. dynamic pressure equals the 0.5* density * (velocity * velocity), a definition given in terms of energy.
3. total pressure is actually a balance of energy. It is a function of static pressure and Maher number. It is the pressure measured by a manometer in the fluid at rest.
4. a reference pressure (operating, pressure) is also present in the fluent
This is because, the pressure term in the NS equation is a derivative form, so when solving the pressure, must be given a reference value can be determined, such as solving a
first-order differential equation, dy/dx=1, for y = x + constant. Only given that constant can the condition of definite solution be formed. The operation pressure in fluent is equivalent to that constant, so theory
Hi, Chang Gu Qiao Shi Jia Gu Guowei, Yun Cha Hong of kappa.
Fluent is to solve the pressure gauge,
Plus, this reference pressure is absolute pressure.
Question 5: post-processing shows why always flashing, abnormal?
Post processing display problems are generally a video card problem:
1. video cards are too old;
2. drive is wrong, not installed DirectX and OpenGL and a series of engines;
3. video card drivers may be damaged by viruses
Question 6: how should the viscosity of the mixture be calculated?
The volume fraction of I component gas in a mixed gas, the molecular weight * I component, gas dynamic viscosity of * I component / sigma (volume fraction of gas I component gas, molecular weight of * I component)
Question 7: what is the PDF model?
The PDF model does not solve the transport equation of a single component, and solves the transport equation of the mixed component distribution. The concentration of each component is obtained by mixing the components. The PDF model is particularly suitable for the simulation of turbulent diffusion flames and similar reaction processes. In the model, the probability density function PDF (probability, density) is used
Function) to consider turbulence effects. The model does not require the user to explicitly define the reaction mechanism, but is handled by the flame surface method (i.e., the mixed burning model) or the chemical equilibrium calculation, and thus has more advantages over the finite rate model.
Question 8:SCCM what is the unit?
Vacuum unit conversions, flow rates and leakage rates: 1 Pa = L/s = 59.2 SCCM
Question 9:Schmidt, what is Number?
The relation between momentum and mass transport: the ratio of viscosity to diffusivity
Question 10:Prandtl, what is Number?
The ratio of kinematic viscosity to thermal diffusivity indicates the degree of difficulty in the transport of momentum and heat
Question 11:Lewis, what is Number?
Is the ratio between the thermal diffusivity and the diffusion coefficient
Question 12: how do I import fluent mesh files into CFX?
First import the gambit mesh to the icem-cfd, and then the cfx. Icem-cfd has the import mesh function and interfaces with the fluent
What about the conflict between 13:Fluent and MATLAB?
In the control panel - >> management service will matlab server off
Question 14:Fluent software expired how to do?
In all directories, find out if there is a file that is newer than the current system time. When you find it, change the file time back. Fluent looks for the latest time in all the files in the computer. If this time is new to the system time, the fluent thinks that the system time has been modified, and it is useless to change the system time.
Problem 15:Phoenics installation FAQ
1. "Tcl error" - not loaded with active.exe (I have no idea in the PHOENICS installer);
2. "visual, FORTRAN, run-time, error" - no FORTRAN installed;
3. "code expired" - the system time has not changed correctly.
Question 16:Fluent common answer 1
Q: in fluent, opening display in grid can only pop up a whitish screen and die. Fluent display:
Error:, Floating, point, error:, divide, by, zero
Error, Object: ()
Error:, FLUENT, received, a, fatal, signal (SEGMENTATION, VIOLATION)
Error, Object: ()
A:1. may be that the graph has not been shown yet, you suddenly turn it off and later show that this is the case. You are advised to save case and date, exit fluent, read again case and date, you can display normally;
2. graphics card for OpenGL support is not good, update video card driver
Question 17:Fluent common answer 2
Q: after startup, display as follows:
Error:, sopenoutputfile:, unable, to, open, file, for, output Error Object: "c:\temp\kill-fluent692""
A: crack is not clean, does not affect the use
Question 18:Fluent common answer 3
Q: when the grid imports fluent
: Building...
: grid,
domain: error: null pointer
a: 计算域指针无效, 一般需要重新生成网格.
问题19: fluent常见报错解答4
q: 运行时出现如下信息:
error:
fluent received fatal signal (access _ violation)
1. note exact events leading to an error.
2. save the case / data under the new name.
3. exit program and reboot to continue.
4. report an error to your distributor.
error object: (a)
a: 只要是严重的错误和发散, fluent都显示这个, 这些信息说明不了任何问题.模型要做一定的调整.
问题20: fluent常见报错解答5
q: 出现如下信息
fluent 6.1.22: welcome to
2003: copyright fluent inc.
: all rights reserved
dump: cannot open file "fl _ s117.dmp".
dump: error: unable to open file
: (a)
encountered: error in critical code section
: hit return to exit.
a: 这可能是整理注册表或清理垃圾文件时把一些fluent要用到的文件清除了.直接重新覆盖安装即可恢复.
问题21: fluent常见报错解答6
q: 计算完display时出现如下信息
error message: the text from graphics function compute _ _ extent:
the device for '/ driver / opengl / win + w0 / inner / scale' doesn't seem to be alive
: an error message from _ camera _ graphics function set by _ volume:
: xmin equal to or greater than xmax at
a: 删掉显卡重装驱动, 并检察directx等是否安装
问题22: fluent常见报错解答7
q: 迭代计算中窗口显示:
turbulent viscosity limited to viscosity ratio of...
a: 这是提示你turbulent viscosity ratio 已超过给定上限, 你可以在solve - controls - limits的选项中加大max turbulent viscosity ratio值, 可以加大2个数量级.
问题23: fluent常见报错解答8
q: 运行fluent出现如下信息
the system clock has been set back
feature: fluent
license path: c: a fluent.inc license.dat a license...
88309 flexlm error: -
for further information, refer to the user manual flexlm himself,
available at "".
a: license过期, 把系统时间一点点往后调就ok
问题24: fluent常见报错解答9
q: 在linux es3下安装了fluent6.1.22, 启动后出现一下提示
copyright 2003 fluent inc.
: all rights reserved
: loading "/ app / fluent / fluent.inc / fluent6.1.22 / lib / flprim.dmp.117-32"
: done.
script file: ding ding fluent3267 in / root /
a: 正常, 其中 "ding script file in / root / ding fluent3267" 是fluent产生的临时文件, 用来杀死fluent及其相关进程, 免得死进程时无法kill.只要fluent是正常退出, 则自动删除.
Question 25: maximum memory cannot be opened when using VC and VF programming more than 256MB, or there may be a warning, only some version of the compiler warning, can still connect running, but how to solve some version of the compiler is not?
Project->setting->Link->Output
Will stack allocations under Reserve and commit?
Change to the maximum number of memory you want
Note: it is counted in bytes, so if you want to open 500MB
You need to write in 524288000 (500*1024*1024)
Problem 26: the gambit was installed, but the runtime said it lacked base80.dll
You ran the wrong Gambit.exe.
Open the directory fluent.inc/ntbin/ntx86, and run the gambit inside
Question 27: what are the authoritative periodicals on CFD in the world?
Journal of fluid mechanics
AIAA (American Aeronautics and Space Administration)
Question 28: what is "convection" and "diffusion"?
A drop of ink is placed in a sink. If the water is still, the range of colors expands evenly around, and this is diffusion. Diffusion is caused by molecular motion.
If water flows, it extends not only the color range but also the distance to the downstream, which is convection. Convection is a fluid mass movement caused by uneven distribution of flow field.
Convection has strong directionality compared with diffusion.
Problem 29:Gambit common error 1
Q: after installation, run the gambit.exe display
: WARNING<17>-H:\hb\fluent\gambit\ntbin\ntx86\GambIT.1264 at 480, in @<#>July21
: 2003, 16:11:54, FDIWHAT, sysfile.c:FILE, EXISTS
: Warning:locale, not, supported, by, Xlib, locale, set, to, C
: Using, X_DEVICE_DRIVER, with, standard, visual.
A: This is normal. Do not close the window using Gambit
Question 30: what is PIV?
Particle image velocimetry
Problem 31:Fluent how to set a barrier with zero thickness
For 3D, draw a face, spilt body, in the connected manner;
For 2D, draw a line, the spilt surface, in the connected manner
Question 32: what is Favre-averaged, N-S, equations?
The mean equation (rather than the ordinary time average) obtained by the Faver mean, which is generally referred to as turbulence, is mentioned in the book.
Question 33:uniform, what is grid?
Uniform mesh
Question 34: what is the difference between a conservative equation and a nonconservative equation?
Conservative and nonconservative equations are also called conservative and non conservative equations. The difference between them is reflected in the convection term of the
equation.
For the conservation equation, the convection term is expressed as div (U in diameter)
Among them, U is the velocity vector, and the phi is the universal variable. In the momentum equation, it is u, V, w
For the non conservation equation, the convection term is not used in divergence form, written for P Udiv.
This can be derived by continuous equations.
If for infinitesimal bodies, these two are equivalent. But the units we actually compute are of finite size, so the two forms have different characteristics. Prominent in the calculation of shock waves. It is impossible to calculate the position of the shock wave and the oscillation of the solution by using the non conservative equation.
In general, we recommend the use of conservation type control equations. Because he's always conservative for any size computing unit.
How is the dimensionless data in question 35:Tecplot?
Dataalter write a formula can
Question 36: how do I import pre files into gambit?
In pre, save the file in.Stp format and import Gambit
What is the difference between the entity and the virtual body in question 37:gambit?
The entities and virtual entities of the gambit do not have any effect on the results when they are generated and calculated, and the main differences between the entity and the virtual body are the following:
1. Entities can perform Boolean operations, but virtual bodies cannot, although Boolean operations cannot be performed, but virtual bodies have functions such as merge, split, and so on.
2, entity computing is available in many CAD software, but virtual body is one of the major features of gambit. After the virtual body, the flexibility of gambit modeling and grid generation has been increased a lot.
3. In the process of mesh generation, if there are several relatively flat surfaces, they can be synthesized by merge one, so, when the grid can save steps, for a relatively large surface curvature, may generate mesh quality is not good, then you can take the way to divide it with split in order to improve the quality of the grid into several small。