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How To Apply Boundary Conditions In A Solid Fulid Heat Transfer?
Posted 2019年5月12日 GMT-4 06:44 Structural & Acoustics, Fluid & Heat, Chemical Reaction Engineering Version 5.3 2 Replies
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Hi ! I am currently doing a two dimensional simulation of a reactor. Chemical reaction take place in this reactor. The reactor is a cylinder reactor. I set up a two-dimensional axial symmetry model to simulate this process. In the core of the cylinder a cooling pipe run through the cylinder and water flow through the cooling pipe taking the heat away. I use heat transfer in porous media to simulate the process in the reactor, and laminar flow, heat transfer in fluid to simulate the heat transfer in the cooling water. Finally I use heat transfer in solid to simulate the heat transfer in the cooling pipe wall. However, I dont konw how to apply boundary conditions between the cooling pipe wall ,the reactor and the cooling water. The model figure is attached. Could anyone tell me how to solve this problem? Thanks in advance!!
I dont konw how to apply boundary conditions between the reactor and the cooling pipe wall, and boundary conditions between the cooling pipe wall and cooling water in order to make the heat transfer from the reactor to the cooling water.
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Heat transfers by conduction, convection, and radiation. You can probably ignore radiation unless you have some extreme heating which this does not appear to be. The conduction will take place "naturally" by setting up your model. Then you need to add heat transfer by convection. If you use bulk flow in the cooling pipe, you can use a heat transfer coefficient at the boundary. If you intend to simulate with more accuracy, you can use a heat convection boundary condition by laminar or turbulent flows in the heat transfer module.
-------------------James D. Freels, Ph.D., P.E.
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Thank you very much !