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

Forum: Main CFD Forum July 30, 2012, 14:38

Replies: 14 calculate temperature gradient from temperature field Views: 2,842 Posted By xiyuqiu Thank you Praveen! This is pretty much what I... Thank you Praveen! This is pretty much what I have. My coefficients do not add up to zero. I will try to fix the round off problem. Thanks again for your genuine help.

Forum: Main CFD Forum July 27, 2012, 15:57

Replies: 14 calculate temperature gradient from temperature field Views: 2,842 Posted By xiyuqiu I think you are right, praveen. It seems when I... I think you are right, praveen. It seems when I sum the flux, I should have zero, but instead I got 10^-10, but my volume is in the order of 10^-10. Therefore, I am getting some non-zero gradient. ...

Forum: Main CFD Forum July 26, 2012, 12:28

Replies: 14 calculate temperature gradient from temperature field Views: 2,842 Posted By xiyuqiu Thank you all for your replies. I think the... Thank you all for your replies. I think the interpolation will help with temperature averaging on each face. However, my problem is even when the temperatures are the same (i.e. no problem with...

Forum: Main CFD Forum July 25, 2012, 14:04

Replies: 14 calculate temperature gradient from temperature field Views: 2,842 Posted By xiyuqiu Thanks for your time Wu Jian, I created a... Thanks for your time Wu Jian, I created a tetrahedron cell with (0,0,0) (1,0,0) (0,1,0) and (0,0,1). With the same temperature on all four points, the method work fine . When I reduced the size,...

Forum: Main CFD Forum July 25, 2012, 00:18

Replies: 14 calculate temperature gradient from temperature field Views: 2,842 Posted By xiyuqiu Hello Wu Jian, I have implemented this Gauss... Hello Wu Jian, I have implemented this Gauss method you suggested. It works great for cells with significant volume. I have tried to run a case with very small cell volume(10^-13) and with same...

Forum: Main CFD Forum July 2, 2012, 12:24

Replies: 14 calculate temperature gradient from temperature field Views: 2,842 Posted By xiyuqiu Dear Wu Jian Thank you for your reply. I... Dear Wu Jian Thank you for your reply. I will look into this. best, yu

Forum: Main CFD Forum June 29, 2012, 14:16

Replies: 14 calculate temperature gradient from temperature field Views: 2,842 Posted By xiyuqiu calculate temperature gradient from temperature field Hello all, I have a field of temperatures (on nodes) and would like to calculate the temperature gradient (at cell center) from them. I was able to do it for structured cubes using finite...

Showing results 1 to 7 of 7

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