Hi all!
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In all setups I tried, setting p_rgh to zero lead to an immediate abort of the solver at timestep 0. Cheers Wolle P.S.: Does anyone have a copy of the complete case discussed above by any chance? |
Temperature problem
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I am trying to do a natural convection case. I got some weird low temperature under the cilinder and pressure stripes at my boundaries Somebody can help me out? See attachment for pictures. The cilinder is 400K and the internal field 300K. If somebody want to see some 0 files, tell me.
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Heat transfer in turbulent pipe flow
Hi, can anybody tell me what has to be the temperature boundary condition of pipe wall and pipe outlet in a turbulent pipe flow where there is uniform heat flux(37.5 W/m^2) at wall and fluid entering at 300K
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Though you have posted this thread a long time ago, I hope you can solve my problem easily. can you please look at this link and make any comment for my problem? I am really struggling with this problem. https://www.cfd-online.com/Forums/op...en-cavity.html |
1 Attachment(s)
Hello Everyone,
I am using chtMultiRegionSimpleFoam and my Openfoam version is 4.1. I have created geometry in Salome and and then imported the UNV file to Openfoam. My geometry consists of a pipe and three rectangular plates, and all these things are in one box. The rectangular plates are acting as a heat source which I made using fvOption. Now, the fluid will flow from the pipe, and due to these hot rectangular plates, the temperature of the fluid will change inside the pipe. At the inlet, I need to put the flow-rate of 5 litres/minutes. At the inltet, temperature could be room temperature. Now, My task is to see the temperature change at the outlet. I have put some boundary conditions for Velocity, Temperature and Pressure, at inlet, outlet and at the walls of pipe. But my solver is not converging. I am not getting which boundary conditions to use. I have tried putting flowRateInletVelocity, but I don't know which boundary conditions to put at other boundaries in this case? I am putting my geometry and boundary conditions with this post. I shall be very thankful, is someone can help me out in this. Thank you Code:
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I have a hot plate coinciding with the bottom of my Domain and I want to simulate the natural convection. The problem is that here I do not know which is my inlet and which one is outlet. I have my boundaries as TOP, SIDES, BOOTTOM & PLATETOP. I have used the inletoutlet conditions of the top & sides and zeroGradient for the bottom. But, it seems that the air isn't moving out of the domain, as the temperature continously goes on increasing and never stabilizes. I have a uniform heat source as the BC for the plate. Can someone help me with this problem?
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