{"id":362955,"date":"2024-04-18T13:17:46","date_gmt":"2024-04-18T13:17:46","guid":{"rendered":"\/forum\/forums\/topic\/help-needed-for-steady-state-thermal-analysis-of-rectangular-fins-and-validation\/"},"modified":"2024-10-11T06:26:24","modified_gmt":"2024-10-11T06:26:24","slug":"help-needed-for-steady-state-thermal-analysis-of-rectangular-fins-and-validation","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/help-needed-for-steady-state-thermal-analysis-of-rectangular-fins-and-validation\/","title":{"rendered":"Help needed for steady state thermal analysis of rectangular fins and validation"},"content":{"rendered":"

I have a engine block model with rectangular fins. The purpose of the analysis is to conduct a steady state thermal analysis with a bore temperature of 100C, thermal conductivity of 170 W\/mC and convection coefficient of 50 W\/m^2C.<\/p>\n

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A named selection for convection includes all the outer surfaces, and the one for constant temperature includes the bore. So I have solved the model and obtained temperature, heat flux and some of these values at specific points using probes. My aim is to take the base temperature of a fin (temperature at the base of the fin), calculate the fin tip temperature from formulas in “Heat and Mass Transfer Data Book” and compare this with the obtained result from Ansys.<\/p>\n

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Why is there such a large deviation between hand calculated and ANSYS result? I know that ANSYS uses a different mathematical model than what is provided in a data book, but I believe this is a big error.<\/p>\n

I also have trouble finding heat flow in Watts for the fins. The value of heat flux obtained from a probe at the fin surface, when multiplied with the surface area of the fin, is also very high compared to hand calculated result of heat flow for same fin.<\/p>\n

Please help me to validate my results and\/or suggest changes in my analysis so that I can close the gap between the results. Thanks.<\/p>\n","protected":false},"template":"","class_list":["post-362955","topic","type-topic","status-closed","hentry","topic-tag-ansys-thermal-1","topic-tag-convection","topic-tag-mechanical-thermal-1","topic-tag-result-validation","topic-tag-Steadystatethermalsimulation-1"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t