I have a question regarding the order of accuracy of the ACM method; Have you done any tests using the method of manufactured solutions ( published or otherwise) ?
I tried the 2D taylor green benchmark but the order of accuracy I am getting is nowhere near what it should be. When comparing with exact solution I used the solution points directly not the subdivided solution in the vtu file to avoid interpolation issues polluting the order of accuracy
Also regarding the ACM, how would one obtain the residual of the continuity and momentum equations? Pseudo-stats only report the change between two consecutive pseudo iterations
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Hi,Thanks for the prompt responseI followed the case illustrated in Cox et al articleIt is a double periodic 2D manufactured solution case, the u, v source terms are evaluated using Mathematica
I attach the ini file hereThe Re = 10
I calculated the order of accuracy in the manner described in the article which is fairly straightforward
I tried different zeta values, different pseudo-dt,, more pseudo-niters-max going as high as 50 which is killing my performance
<image.png>Error distribution of U for Mesh 16x16 , order 4.0
Distribution of U Numerical solution for Mesh 16x16 , order 4.0
How small is the dt that you are using, and do the numbers change when you reduce it further?
What do you mean quantitatively by ‘killing performance’Are you using local pseudo dt and PMG etc. for the inner iterations, or just plain RK4?
On 7 Oct 2020, at 11:25, Mohamed M. Kamra <mo7amme...@gmail.com> wrote:
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