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Showing results 1 to 7 of 7 Search took 0.00 seconds. Search: Posts Made By: hiter

Forum: Main CFD Forum January 29, 2014, 12:32

Replies: 11 divergence free of homogeneous isotroy T in real space (By using Rogallo's method) Views: 1,536 Posted By hiter Sorry the answer so later. Acutally, I change the... Sorry the answer so later. Acutally, I change the form of the power spectrum. So that there is little energy in the high wave number region. In this way, the mass consvation up to 10^-4. At first,...

Forum: Main CFD Forum November 27, 2013, 16:52

Replies: 11 divergence free of homogeneous isotroy T in real space (By using Rogallo's method) Views: 1,536 Posted By hiter I will study now. Thanks. Really approiate. I will study now. Thanks. Really approiate.

Forum: Main CFD Forum November 27, 2013, 16:18

Replies: 11 divergence free of homogeneous isotroy T in real space (By using Rogallo's method) Views: 1,536 Posted By hiter Thanks I know that after IFFT, in real... Thanks I know that after IFFT, in real space, using the CD schme the error could not be O(-14). But I my case, it is really large, sometimes approximaly equals zero. So the deviation is obvious. ...

Forum: Main CFD Forum November 27, 2013, 15:59

Replies: 11 divergence free of homogeneous isotroy T in real space (By using Rogallo's method) Views: 1,536 Posted By hiter YES, When I add the constrains for the random... YES, When I add the constrains for the random generated image part Imag(0)=Imag(N1/2) = 0.0. I can obtain the desired resluts.

Forum: Main CFD Forum November 27, 2013, 15:51

Replies: 11 divergence free of homogeneous isotroy T in real space (By using Rogallo's method) Views: 1,536 Posted By hiter Thanks, cfdnewbie I both used the second order... Thanks, cfdnewbie I both used the second order and the fourth order. i.e., - U(i-1,j,k) + U(i+1,j,k) - V(i,j-1,k) + V(i,j+1,k) - W(i,j,k-1) + W(i,j,k+1) This part is no problem, I think. ...

Forum: Main CFD Forum November 27, 2013, 03:37

Replies: 11 divergence free of homogeneous isotroy T in real space (By using Rogallo's method) Views: 1,536 Posted By hiter hi cfdnewbie, Thanks. I also noticed that... hi cfdnewbie, Thanks. I also noticed that error,. Yes, as you mentiond, it is K3. Actually, I added the minus sign. Currently, I performedd the 3D FFT/IFFT by MKL. The results are in accord with...

Forum: Main CFD Forum November 26, 2013, 19:56

Replies: 11 divergence free of homogeneous isotroy T in real space (By using Rogallo's method) Views: 1,536 Posted By hiter divergence free of homogeneous isotroy T in real space (By using Rogallo's method) Hi everyone, I am focusing on the generation of HIT by using the method proposed by Rogallo. In fourier space, the mass conservation i.e. kx*ux + ky*uy + kz*uz = 0 reaches the mechine accuraty (to...

Showing results 1 to 7 of 7

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