code_saturne User's Forum

Hello,

The MESH_00.case and IB_MESH.case should help you visualize whether the immersed boundary is where you expect it. Actually, in the master branch (since revision fa9358ab, last friday), you can also visualize the faces where cells are cut, by calling;
cs_porous_model_enable_post();
in cs ...

Hello,

I have not tested the cs_mesh_cartesian_define_from_csv function, but I guess you could try it.

In a test case I am more familiar with, cs_mesh_cartesion_define_simple is used(and this could even be done through the GUI), and in cs_user_parameters,,

cs_glob_porosity_ibm_opt->porosity_mode ...

Hello,

You can run "code_saturne bdump checkpoint/main.csc" to get more info on file and see if it complete (it should end in an "EOF" section).

It has probably been corrupted, but how ? If this occurs at each run, this is an issue. If it occurs once, it is probably not worth bothering to analyze ...

Hello,

Regarding layer compression, not that code_saturne's algorithm, as called in user-defined functions, works in 2 steps. The first step returns a structure containing an array of vectors, one for each extruded node, and a series of curvilinear coordinates for positioning of each layer. in ...

Hello,

This really depends on the algorithm you use. In code_saturne, most models assume physical properties do not change too rapidly (otherwise, other types of solvers or algorithms are used, such as the cycle used in neptune_cfd's multi-phase solvers). The segregated nature of the solver in code ...

Hello, there is no direct way of doing this with the GUI.

In user-defined functions, setting a field's 'post_vis' keyword not to 1 but to
CS_POST_ON_LOCATION | CS_POST_BOUNDARY_NR
(or 3) should active the output off boundary values, bit note that those values are not reconstructed, so not exactly ...

Hello,

As I mentioned in the previous topic, code_saturne can be very sensitive to the mesh quality in LES computations, and there is no simple way to solve this, except to use a more regular (ideally hexa-blocked) mesh, and avoid abrubt changes in refinement.

Some numerical options, such as the ...

Hello,

Inner iterations (nterup) can be used in the velocity/pressure coupling algorithm mostly for FSI computations, but I do not think they ate required for URANS. The same, sweeps for each solver are used to better handle mesh non orthogonalty (where some reconstruction terms are handled ...

Hello,

The "steady" option is actually (as mentioned) "pseudo-steady", because it is not based on a steady algorithm, but on an unsteady algorithm with a local time step which allows faster convergence to steady state.

In most cases, the fact that a RANS computation leads to stable or fluctuating ...

Hello,

We are definitely not planning on building a separate mesher, and plan to continue using external meshers.

The closest we would have to an internal mesher are actually "mesher-avoiding" methods such as the current work on immersed boundaries and porosity from point scans.

There are ...