Hence for the 0/T file we can use fixedGradient with the gradient set to 0. The last two boundaries ( symmetryWalls) are symmetric which implies no heat flow through the boundary. The front and back boundaries ( emptyWalls) are of the type empty since we don’t consider heat conduction in this direction. The inner ( innerWall) and outer ( outerWall) radial boundaries are of the fixedValue type since they are held at constant temperature. The boundary conditions for the radial heat transfer case studied in this post. The boundary conditions are shown in Figure 2 and are straightforward to implement from instructions in previous posts. Boundary conditionsĪs usual, we set the boundary conditions in the 0/T file for each patch. In the previous post we finished setting up the geometry, so the next thing to do is set the boundary conditions. The inner and outer radial surfaces are maintained at constant temperatures so heat can only flow in the radial direction. The pipe under consideration for cylindrical heat transfer in OpenFOAM. The length of the pipe isn’t required for this analysis. 1 We’ll later find that this value isn’t needed in this analysis but kept it here for completeness. The pipe is made from a material with thermal conductivity of 4W/mK. The inner and outer radius are maintained at 100 oC and 20 oC, respectively. Figure 1 shows a cylindrical pipe with inner and outer radius of 0.03m and 0.07m, respectively. Let’s begin! Problem statementīefore we proceed with OpenFOAM, a quick recap of the problem statement is required. Our aim was to find the temperature distribution through the pipe wall and compare the result against the analytical solution. Cylindrical systems such as pipes and tubes are common in thermal engineering so it’s good to get exposure to these in OpenFOAM. This post will continue from the previous post on cylindrical heat transfer using OpenFOAM ( here).
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