i am providing a constant heat flux at the the bottom of aluminuim plate and want to know the time dependent temperature distribution of the top surface i also want to extract the contour of top surface.
Dear Kanishk
To answer this question, we need a reynolds number to detect the flow regime. Then we can analyze this question with the appropriate model.
You can do the analysis by using thermal element Solid 70. Your analysis should be 'transient, Full' analysis. For air flow you can use forced convection over the surface by defining the convection film co-efficient. And other side you can apply heat flux. You should apply time-time step for transient analysis. Always remember heat flux and convection should not put in same surface at same time. You have put all the thermal properties: thermal conductivity, specific heat and density as material properties. Your results will be good if you can use temperature dependent material properties.
If you want air flow analysis then you have to do CFD analysis. For that solid liquid interaction model you have to do. You will get help from Ansys-Fluent tutorial for this also.
I don't know the flow conditions but you should determine the Reynolds number first to kown which flow regime do you have in your problem. If there is turbulence (I guess you have), check the Fluent tutorial to see which turbulent model is more suitable to your case(see the k-epsilon model).
You can extract all the contours that you want at the "Results".
Dear Sir
The best way to describe the heat transfer is by using the Nusselt number as following: The local Nusselt number plot: *choose plot * XYplot * Wall fluxes (Y axis function ) *Surface Nusselt Number.* Chosse the wall where you want to show Nusselt number then *Plot. and to calculate the average Nusselt number use the formulation Nu = hL/k. Where h is Surface heat transfer coefficient obtained again from Contours of Wall fluxes. ( surface integral --> wall flux (Area-weighted average) -> heat transfer coefficient ) Or directly. Report---> Surface integrals-->Area-weighted average --> Wall fluxes--> Surface Nusselt surface--> Compute (Area-weighted average). Good Luck
This is a simple CHT (Conjugate Heat Transfer) analysis. Meshes for the solid material and the fluid domain can be generated separately. With corresponding meshing workflow it can be generated in one shot as well. The thin solid material is best meshed with some layers of regular hexahedral cells. For the fluid domain I would prefer a hex mesh as well, with a near-to-surface mesh refinement to obtain a dimensionless near-wall distance of the first mesh node y+
Dear Kanishk
To answer this question, we need a reynolds number to detect the flow regime. Then we can analyze this question with the appropriate model.
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