[vinerm]

The mesh looks good though you have some jumps in the size, but it should not be a problem since the jumps are not large.

[Mutlaq]

Originally Posted by vinerm

The mesh looks good though you have some jumps in the size, but it should not be a problem since the jumps are not large.

I'm really grateful to you.

[Mutlaq]

Originally Posted by vinerm

The mesh looks good though you have some jumps in the size, but it should not be a problem since the jumps are not large.

Mr. vinerm How can I check my results if the results of all research are related to y+? I try to calculate y+ but that very difficult in fluent

[vinerm]

You don't need to calculate ; it is already available as Wall Yplus under Turbulence. However, it is not available if the flow is laminar.

[Mutlaq]

Originally Posted by vinerm

You don't need to calculate ; it is already available as Wall Yplus under Turbulence. However, it is not available if the flow is laminar.

it is available for a first layer only not exceed 2 or 1 is related with the value of y+ that I put of mesh only for first layer, not all layers

[vinerm]

has significance only for the first layer. What you are talking about is not from one case but from different cases with different values.

[Mutlaq]

Originally Posted by vinerm

has significance only for the first layer. What you are talking about is not from one case but from different cases with different values.

so they merge the results of all of the mesh test. did you mean that?

[vinerm]

No one does it that way. The results are usually based on theory or experiments. Using CFD, no one plots results against ; it does not make sense because that is the input to CFD and not its output.

[Mutlaq]

Originally Posted by vinerm

No one does it that way. The results are usually based on theory or experiments. Using CFD, no one plots results against ; it does not make sense because that is the input to CFD and not its output.

so how I can validate the results with other research paper if almost of paper results with either velocity friction or with y+

[Mutlaq]

Originally Posted by vinerm

No one does it that way. The results are usually based on theory or experiments. Using CFD, no one plots results against ; it does not make sense because that is the input to CFD and not its output.

Many research papers have similar results to the picture

[vinerm]

Those are based on DNS (and LES), both being scale resolving simulations, though LES also requires wall modeling. In those cases, at least in DNS, all the scales are resolved and no modeling is required. That means, the results are same as those from experiments. The meshes are extremely fine and usually NOT solved in time domain, but in frequency domain. Nonetheless, the profile requires shear stress availability at different distances from wall. You can also do that, but if you are using a wall function, then it does not make sense. It would be akin to entering a profile and then plotting it to show it as an outcome, which it is not. If you are resolving the boundary layer, then you can determine wall shear stress using different values of wall distance and plot this graph. Refer the following

https://ansyshelp.ansys.com/account/..._th_stdwf.html

[Mutlaq]

Originally Posted by vinerm

Those are based on DNS (and LES), both being scale resolving simulations, though LES also requires wall modeling. In those cases, at least in DNS, all the scales are resolved and no modeling is required. That means, the results are same as those from experiments. The meshes are extremely fine and usually NOT solved in time domain, but in frequency domain. Nonetheless, the profile requires shear stress availability at different distances from wall. You can also do that, but if you are using a wall function, then it does not make sense. It would be akin to entering a profile and then plotting it to show it as an outcome, which it is not. If you are resolving the boundary layer, then you can determine wall shear stress using different values of wall distance and plot this graph. Refer the following

https://ansyshelp.ansys.com/account/..._th_stdwf.html

Mr. vinerm I ploted the urms/ut Vs y+ but I don't why the plot appears like this, did you have any idea?

[Mutlaq]

Hi, Mr. vinerm how are you?
can I ask you how can i find Ave Nusselt number???

[Mutlaq]

[QUOTE=vinerm;773044]The mesh looks good though you have some jumps in the size, but it should not be a problem since the jumps are not large.[/QUOTE

Hi Mr. Vinerm I would asked you about how can add hardness to CFX ANSYS I CANT FIND IT
IF YOU HAVE IDEA HELP ME PLZ]