Example with analytical solution

hesam

October 2021 in DualSPHysics v5.0

greetings everyone!

Are there any examples with analytical solutions in this program?

(such as Taylor-Green Vortex)

Regards

Comments

Asalih3d

October 2021

There is an example with Poiseuille flow, if that is what you mean?
I also believe that the Taylor-Green Vortex has been simulated in a few different SPH papers, but I don't think there is an easy way to do it directly inside of DualSPHyiscs, without altering the code - I might be wrong though!
Kind regards
hesam

October 2021

https://forums.dual.sphysics.org/discussion/comment/4652#Comment_4652
Thanks for your guidance!
I tried to solve the Taylor-Green Vortex problem with Dualsphysics, but when I set the gravity to zero, it gives an error.
Kind regards.
Asalih3d

October 2021 edited October 2021

What was the error? It could simply be that you have to specify a speed of sound directly, which is a common error when gz has been set to zero.
Kind regards
hesam

October 2021

https://forums.dual.sphysics.org/discussion/comment/4655#Comment_4655
Dedicated to you
Alex

October 2021

Please follow the example in DualSPHysics_v5.0\examples\main\03_MovingSquare where we have imposed the value of cteB:
<b value="1.1200e+05" auto="false" />
Otherwise with gravity = 0 then cteB=0

Regards
hesam

November 2021

https://forums.dual.sphysics.org/discussion/comment/4657#Comment_4657
Thank you very much for your guidance and kindness
Asalih3d

November 2021

https://forums.dual.sphysics.org/discussion/comment/4656#Comment_4656
Exactly as @Alex said, just to show you the formula as well:

So you should not set b to anything random, but here you have a formula of how to calculate it.
Kind regards
hesam

November 2021

https://forums.dual.sphysics.org/discussion/comment/4661#Comment_4661
Thank you very much for making this clear to me

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