Using the Inverse Method to Investigate Flow Models for Mixed Convection of Annular Finned Tube Heat Exchanger

The inverse heat conduction method (IHCM) and three-dimensional (3D) computational fluid dynamic (CFD) in combination with are used to select the appropriate flow model near-wall treatment for mixed convection of annular finned tube exchanger. Thus, numerical results obtained by all k-ε models treatments yielded 4 m/s ≤ Va 5 m/s. First, IHCM combined is applied estimate Q values. estimates as reference values CFD. show that Tk standard (STD) wall function (SWF) closer than those realizable (REAL) RNG various functions 4-5 value from STD SWF, =5 S=15 mm may be 1.14 times 0.48 REAL model. SWF about 1.6-1.7 EWT S = These differences mean needs varied obtain more accurate results. y+ does not exceed 3. However, exceeds 6. To our best knowledge, no studies have explored this issue present investigation tries bridge gap.