code_saturne User's Forum

Hello,

CFL -> Courant–Friedrichs–Lewy (CFL) condition.

https://en.wikipedia.org/wiki/Courant%E ... _condition

Regards,

Luciano

Hello, You need a temperature reference state for the Boussinesq approximation. The tutorial mention that "The reference state is taken at the cold wall temperature", so the Tref sould be 293.15K. For convergence checking as mentioned in the tutorial you can " Verify that the residual...

Hello Olivier, Please, next time post the updated subroutine Whe you mentioned that you "digging" the alelav.f90, did you debug or printed the values of pimpv(i) for any face??. Because I debugging (printing) the data in alelav.f90 and I don't get any face that satisfied the condition if (...

Hello, I was checking you case and the problem it is with the value of the air expasion coeff that you compute. With the data that you defined you get a \beta=3.3224e-12 , so something in your formula is wrong. If you set \beta=0.0033 the flow start moving. Also, if you look at the listing file all ...

Hello olivier, I was looking at your problem. First of all, I couldn't run but I found some issues in the user subroutine. 1) You have a if (.false.) then before the boundary selection. 2) call getfbr('5', nlelt, lstelt) any of your baundaries has this ('5') indentifier. 3) The axis of your mesh are...

Hello In CS 4.0.5 you can use the Mathematical Expression Editor for a variable density \rho(T) and write the Boussinesq Model with the correspondig thermal expansion coefficient of the fluid that you want to simulate. The following is an example: #air expansion coefficient (1/K) b=0.00343; #Ref tem...

Hello Yvan, I have compile the converter and it works. I can convert snappy meshes (with and without boundary layers) to CS, but no all the genereted meshes are valid for CS. Some quality parameters in SHM has to be tunned in order to obtain a valid mesh, but once you get the appropiated parameters ...

Hello Yvan, I had seen this converter but the last version has 2 years and I thought it wouldn't work, so I write a python script to convert VTKtoMED (polyhedron meshes) but it is not as robust as I want, for some meshes appears negatives volume. I will try to compile the converter and comment the r...

Hello, I write in this Discussion forum in order to know if any was able to create hexa dominan meshes like that obtained with snappyhexmesh. This kind of meshes are very well suited for finite volume method, getting better convergence, lower diffusion between other benefits. I was doing some resear...

Hello Oscar, If I'm not misunderstanding your question you can retain the boundaries group through the the GUI of CS. You have to go to the "Mesh" tab In the "Calculation Control" -> "Output Control" section and there you can use the same selection criteria that you use...