1Non-isothermal Equations of changeEnergy conservation for homogeneous mediaTotal energy balance ˆˆ()......KKEUtpSuquτuug . ....:.KKEEppt uτuτgKinetic energy balance.( ) ..:UUpSt uτuInternal energy balanceˆˆ..:.HpHpStt τEnthalpy balanceEnergy conservation for homogeneous mediaSimplifications of the enthalpy equation with constant kand Cp1. Viscous dissipation is negligible in most practical flow problems:2. Ideal gases and2ˆpTpCTkTS p 4. Incompressible fluids (also valid for small variation of density) and 2ˆ.
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