Lattice Boltzmann method for heat diffusion in axis-symmetric geometries Online publication date: Mon, 10-Aug-2009
by A.A. Mohamad
Progress in Computational Fluid Dynamics, An International Journal (PCFD), Vol. 9, No. 8, 2009
Abstract: Lattice Boltzmann Methods (LBM) have been used to solve momentum, heat and mass transport equations mainly in Cartesian coordinate system. In the present work, the LBM is extended to solve transports in axis-symmetric geometries, such as pipes and spheres. Heat diffusion and conduction in solids without and with heat generation were tested. The heat diffusion equation for axis-symmetric problem is reduced to diffusion equation as in Cartesian coordinate with an extra term due to the surface area variation along the radial direction. The extra term is treated as a source term (forcing term) in LBM. The extra term can be approximated by using finite difference or more accurately as a flux term. The results predicted by LBM are well compared with analytical solutions and finite volume method.
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