{"id":164550,"date":"2021-12-03T15:43:18","date_gmt":"2021-12-03T15:43:18","guid":{"rendered":"\/forum\/forums\/topic\/how-to-estimate-the-enthalpy-of-the-coolant-when-it-is-subjected-viscous-heating\/"},"modified":"2021-12-09T18:07:48","modified_gmt":"2021-12-09T18:07:48","slug":"how-to-estimate-the-enthalpy-of-the-coolant-when-it-is-subjected-viscous-heating","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/how-to-estimate-the-enthalpy-of-the-coolant-when-it-is-subjected-viscous-heating\/","title":{"rendered":"How to estimate the enthalpy of the coolant when it is subjected viscous heating"},"content":{"rendered":"
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I am simulating a case of an electric motor which is actively cooled using a coolant. I am using Ansys fluent, steady state, pressure based solver. I have activated the viscous heating option from viscous models to include the power loss occurring due to viscous dissipation effect of the coolant. I have run the simulation and have achieved convergence. I am interested to estimate the heat absorbed by the coolant, for that i need to estimate the enthalpy of the coolant at the inlet and outlet.<\/p>\n

From Surface integrals – heat fluxes- I got the values of enthalpies at the inlet and outlet, but these values does not match properly with a theoretical expression of Hi = m*Cp*(T-Tref) where Tref is 298.15 K.<\/p>\n

I would like to know, is there any other way to estimate the enthalpy or any other theoretical expression exclusively used when using viscous heating.<\/p>\n

<\/p>\n<\/p>\n

Here i would like to let you know that the values of enthalpy at the inlet and outlet goes hand in hand with the theoretical expression only when there is No Viscous Heating happening in the fluid.<\/p>\n","protected":false},"template":"","class_list":["post-164550","topic","type-topic","status-closed","hentry"],"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