Application of an EASM model for turbulent convective heat transfer in ribbed duct
A numerical investigation is performed to predict local and mean thermal-hydraulic characteristics in rib-roughened ducts. The Navier-Stokes and energy equations, and a low-Re number {kappa}-{epsilon} turbulence model are solved with two methods for determination of the Reynolds stresses, eddy viscosity model (EVM) and explicit algebraic stress model (EASM). The numerical solution procedure uses a collocated grid, and the pressure-velocity coupling is handled by the SIMPLEC algorithm. The assumption of fully developed periodic conditions is applied. The calculated mean and local heat transfer enhancement values are compared with experimental data and fairly good agreement on mean Nu numbers is achieved. The prediction capabilities of the two turbulence models (EVM and EASM) are discussed. Both models have similar ability to predict the mean Nusselt numbers but the EASM model is superior in description of the flow field structure.
- Research Organization:
- Lund Inst. of Tech. (SE)
- OSTI ID:
- 20002512
- Report Number(s):
- CONF-990805--
- Country of Publication:
- United States
- Language:
- English
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