Greetings,<\/p>\n
Im conducting right now an experiment for my thesis. I’m not very acquainted with CFD, so excuse if this seems easy.<\/p>\n
My geometry consists of a 3D salt water volume, encapsuled within a stainless steel pipe of an already meshed thickness, wich in turn is encapsuled within distilled water. Boundary conditions are known for both inlets. It is a turbulent problem (High Reynolds Number) and using k epsilon with standard wall treatment. The study consist of the generation of a biofilm layer next to the salt water part of the pipe in time. <\/p>\n
As the solid geometry is meshed, 2 coupled wall interfaces are created with its shadow walls. I left the distilled water wall interface as coupled with 0 wall thickness and 0 flux and the salt water interface with my expression of wall thickness increasing with time. So by what i’ve been seen in the users guide, the heat transfer is calculated with the meshed geometry thickness and then the expression is applied concerning time. The problem is that, while there is heat transfer within the walls, theres none with the fluids. <\/p>\n
Now, i also tried with only 2 meshed fluids, let fluent create an interior wall as interface, and make shell conduction with 2 layers, but alas no heat transfer also between the fluids. <\/p>\n
Maybe Im missing something out of lack of Fluent expertise. <\/p>\n
The only thing that occurs to me is making a steady state calculation, get it to converge and after apply my wall thickness change trough time. <\/p>\n
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