# StressedFoam

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 November 22, 2005, 00:58 Hi, I am interested to use #1 New Member   Ravindra Join Date: Mar 2009 Posts: 4 Rep Power: 8 Hi, I am interested to use 'stressedfoam' solver to calculate thermal stress. For learning, I tried to solve tutorial example 'cavity' with thermal stress 'on'. The displacement field 'U' seems to fine but stressed field shows some numerical problem. At the block interface, it shows some kind of numerical error in stress field. I think, I am making some silly mistake ? I would be glad, if some help is provided to solve this problem. Ravi

 November 22, 2005, 05:03 Does the plateHole tutorial wo #2 Super Moderator   Mattijs Janssens Join Date: Mar 2009 Posts: 1,416 Rep Power: 16 Does the plateHole tutorial work with thermal stresses? What block interface is this? cavity is only one block?

 November 22, 2005, 06:08 Thanks for prompt response. #3 New Member   Ravindra Join Date: Mar 2009 Posts: 4 Rep Power: 8 Thanks for prompt response. I was trying to add thermal stress in plateHole problem by changing boundary condition for hole surface temperature (T= 400). I had changed parameter 'thermalStress' as 'yes' in file 'constant/thermalProperties'. I suppose by doing so I can solve thermal stresses. About block interface: In file 'blockMeshDict' we use command 'blocks' to create multiple block (in this example there are 5 blocks). We define boundary patches but there are internal patches which connect this blocks. I am getting some spurious solution near the internal connecting patches. Ravi

 November 22, 2005, 09:00 You need a better gradient cal #4 Senior Member   Hrvoje Jasak Join Date: Mar 2009 Location: London, England Posts: 1,758 Rep Power: 21 You need a better gradient calculation algorithm to deal with the local mesh distortion. Change the default gradient scheme to least squares and all will be well. If you can still see problems, please shout and I'll have a look at it. Something like this: system/fvSchemes gradSchemes { default leastSquares; } Enjoy, Hrv __________________ Hrvoje Jasak Providing commercial FOAM/OpenFOAM and CFD Consulting: http://wikki.co.uk

 November 28, 2005, 04:02 Thank you very much. It works #5 New Member   Ravindra Join Date: Mar 2009 Posts: 4 Rep Power: 8 Thank you very much. It works properly with "least squares" gradient schemes. Ravi

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