Integral transform solution of natural convection in a square cavity with volumetric heat generation

Brazilian Journal of Chemical Engineering

C. An¹  C. B. Vieira¹  J. Su¹ 

[1] ,Universidade Federal do Rio de Janeiro Nuclear Engineering Program Rio de Janeiro RJ ,Brazil

关键词: Natural convection;    Square cavity;    Volumetric heat generation;    Integral transform;    Hybrid solution;   

DOI  :  10.1590/S0104-66322013000400020

来源: SciELO

【 摘 要 】

The generalized integral transform technique (GITT) is employed to obtain a hybrid numerical-analytical solution of natural convection in a cavity with volumetric heat generation. The hybrid nature of this approach allows for the establishment of benchmark results in the solution of non-linear partial differential equation systems, including the coupled set of heat and fluid flow equations that govern the steady natural convection problem under consideration. Through performing the GITT, the resulting transformed ODE system is then numerically solved by making use of the subroutine DBVPFD from the IMSL Library. Therefore, numerical results under user prescribed accuracy are obtained for different values of Rayleigh numbers, and the convergence behavior of the proposed eigenfunction expansions is illustrated. Critical comparisons against solutions produced by ANSYS CFX 12.0 are then conducted, which demonstrate excellent agreement. Several sets of reference results for natural convection with volumetric heat generation in a bi-dimensional square cavity are also provided for future verification of numerical results obtained by other researchers.

【 授权许可】

CC BY   
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