code_saturne User's Forum

Hello all, I am working on optimizing the PSWIFT parametrization of complex street canyon geometries. For that, I am currently setting up an LES simulation for a periodic street canyon (see picture) and I was wondering about the cell sizes near the walls. My university tutor told me to aim for y+ = ...

Hello Yvan, I have now changed my approach to a source term. I defined a group of cells called 'Source_cells' on the top of the domain, where the velocity in x direction should be 8 m/s. I wrote that term into the ustsnv subroutine of cs_user_source_term.f90. However, the value reached after converg...

Hello Yvan,

Thank you so much for your clarifications!

Bonne journée,

Victor

Hello,

Does anybody know if there is an equivalent model to the RNG k-epsilon model in code saturne? I have tried looking into the theory of the linear production model but it does'nt seem to be exactly the same model.

Thanks a lot in advance for your help!

Best regards,

Victor

Hello Yvan, Thank you very much for your helpful answers! I have managed defining a horizontal inlet BC by activating the atmospheric module and giving the code a meteorological file containing a simple 1D velocity profile with only horizontal U-components. Right now, it looks like code saturne read...

Hello, The flow is fully turbulent, so the problem might be due to the wall function, as you pointed out. In case of the inlet type boundary condition with a tangential component (acting as a regular dirichlet), would that be the same problem? Would there also be some sort of wall function created? ...

Hello Yvan, thank you so much for your reply, I have now made the periodicity work and the simulation runs fine! The only issue I have left is when setting my boundary condition at the top of the domain. I want to impose a tangential velocity component Ux = 8 m/s at z = 180 m (so at the top boundary...

Hello, I am new to code_saturne and I am trying to simulate the flow over a series of urban street canyon (gaps between buildings). To do that, I chose to apply periodic boundary conditions between the inlet and outlet faces ('West' and 'East'). When I launch the simulation, those periodicities seem...

Hi Yvan!

I'm having the same issue as Daniele and I used a normal velocity profile at my inlet. My periodic boundary conditions are set between the inlet and outlet face. Is that velocity profile preventing the periodicity to settle in?

Best regards!

Victor