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How to output the Nusselt number
I calculate a jet cooling problems use Openfoam，Then I use the Tecplot post-processing，But I can't output the Nusselt number，or the heat transfer coefficient。Who can help me？
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Well, you can output the variable using utility, please refer the following link for more information... http://www.cfd-online.com/Forums/ope...timesteps.html :) |
Thank you for your reply.Because I am a newbie on OpenFoam,I only can output the temperature and speed using Tecplot.Can you tell me what variables wo should output to get Nusselt number and the methods.Thank you .
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I have to OpenFoam version 2.1.1. I want to use the wall heat flux function.But when I enter this command.It shows this function could not be found.How should I set.Because I is the isothermal wall condition.I need to output the wall heat flux to calculate heat transfer coefficient
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In the weblink: http://www.cfd-online.com/Forums/ope...timesteps.html Check this code: ################### volScalarField gradT ( IOobject ( "gradT", runTime.timeName(), mesh, IOobject::NO_READ, IOobject::AUTO_WRITE ), mesh, dimensionedVector ( "gradT", T.dimensions()/dimLength, 0 ) ); label patchi = mesh.boundaryMesh().findPatchID("myPatch"); gradT.boundaryField()[patchi]=T.boundaryField()[patchi].snGrad(); runTime.write(); ##################### This is similar to the $utility/Postprocessing/wall/wallGradU file. Copy this file and make new wallGradT file. You need to put T instead of U, as mentioned above. Then try to compile the same. After you finish with this, run the utility in the case folder. :) |
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