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Showing results 1 to 11 of 11 Search took 0.00 seconds. Search: Posts Made By: mmkr825

Forum: OpenFOAM October 10, 2012, 12:24

Replies: 20 Is div(grad(U))=laplacian(U) ??? Views: 5,271 Posted By mmkr825 Hi Ata, I decreased delta t, case... Hi Ata, I decreased delta t, case is running but giving wrong results. I taken delta T as 0.000005. Thanks Regards Mallikarjuna

Forum: OpenFOAM October 10, 2012, 05:52

Replies: 20 Is div(grad(U))=laplacian(U) ??? Views: 5,271 Posted By mmkr825 Hi Ata, At the last iteration it... Hi Ata, At the last iteration it is max: 1.42329e+96. And my delta t is 0.005. At first iteration courant no < 1. But it is gradually increasing. Thanks Regards Mallikarjuna

Forum: OpenFOAM October 10, 2012, 05:32

Replies: 20 Is div(grad(U))=laplacian(U) ??? Views: 5,271 Posted By mmkr825 Hi Ata, when i run my case by... Hi Ata, when i run my case by using modified icoFoam solver, it is running some iterations giving some error as follows. Error:- Time = 0.145 Courant Number mean: 7.93942e+94...

Forum: OpenFOAM October 10, 2012, 02:32

Replies: 20 Is div(grad(U))=laplacian(U) ??? Views: 5,271 Posted By mmkr825 Hi Ata, I tried for the icoFoam... Hi Ata, I tried for the icoFoam solver and for cavity case. I taken relaxation factors as you suggested 0.01 for both p and U. Here nu is constant. And i used gauss linear for div() and...

Forum: OpenFOAM October 9, 2012, 06:57

Replies: 20 Is div(grad(U))=laplacian(U) ??? Views: 5,271 Posted By mmkr825 Hi Ata, I tried for both of... Hi Ata, I tried for both of relaxation factors 0.01. I think my solver is in non conservative form. At First i tried for icoFoam solver by replacing laplacian (nu, U) by...

Forum: OpenFOAM October 8, 2012, 06:08

Replies: 20 Is div(grad(U))=laplacian(U) ??? Views: 5,271 Posted By mmkr825 Hi Ata, I developed my own solver... Hi Ata, I developed my own solver for predicting velocity profile(U) and particle concentration profile(T) for suspension flow (fluid+particles). And in my momentum equation, the...

Forum: OpenFOAM October 8, 2012, 01:07

Replies: 20 Is div(grad(U))=laplacian(U) ??? Views: 5,271 Posted By mmkr825 Hi Ata, My solver is steady state.... Hi Ata, My solver is steady state. I have taken relaxation factors as for p=0.2,U=0.07. Thanks Regards Mallikarjuna

Forum: OpenFOAM October 7, 2012, 08:02

Replies: 20 Is div(grad(U))=laplacian(U) ??? Views: 5,271 Posted By mmkr825 hi Ata, I have taken relaxation factor... hi Ata, I have taken relaxation factor as 0.2. But still it is coming the same Thanks Regards Mallikarjuna

Forum: OpenFOAM October 7, 2012, 06:41

Replies: 20 Is div(grad(U))=laplacian(U) ??? Views: 5,271 Posted By mmkr825 Hi Ata, Thanks for your reply. I... Hi Ata, Thanks for your reply. I tried with low relaxation factor but it is not working. Is there any other method to solve this problem? If it is there please guide me Thanks...

Forum: OpenFOAM October 7, 2012, 01:39

Replies: 20 Is div(grad(U))=laplacian(U) ??? Views: 5,271 Posted By mmkr825 Hi Ata, Thanks very much quick... Hi Ata, Thanks very much quick reply. You are correct, i am getting instability. could you please suggest me to rectify this problem. I need to use div(gradU+gradU.T()) in my problem. ...

Forum: OpenFOAM October 4, 2012, 08:00

Replies: 20 Is div(grad(U))=laplacian(U) ??? Views: 5,271 Posted By mmkr825 Is div(grad(U))=laplacian(U) ??? Hi Everyone, I have a doubt about div() and laplacian(). For the general case in all solvers we written gamma*div(grad(U))=laplacian(gamma, U). But when i...

Showing results 1 to 11 of 11

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