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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

A COUPLED LATTICE BOLTZMANN-FINITE DIFFERENCE APPROACH FOR BOILING TWO-PHASE FLOW WITH HIGH DENSITY RATIOS

Get access (open in a dialog) DOI: 10.1615/IHTC16.cms.022464
pages 1705-1712

Resumo

We successfully simulated a series of pool boiling process, such as nucleation, growth, coalescence, and departure of vapor bubbles, with density ratio of 1000 using a coupled lattice Boltzmann-finite difference method. In our model, the continuity and Navier−Stokes equations are solved by the cascaded pseudopotential lattice Boltzmann model recently proposed by Lycett-Brown and Luo [Phys. Rev. E 94, 053313 (2016)] to deal with the high-density-ratio two-phase flows; the temperature equation with a source term to trigger phasechange is solved by the finite difference method to avoid the error term due to high-density ratio of multiphase flows which is pointed out by Li et al. [Int. J. Heat Mass Transfer 85, 787 (2015)]. The numerical results show that our model well reproduces the fundamental characteristics of the boiling curve for pool systems.