NDLI: Numerical Simulation of Two-Layer Fluid Natural Convection in a Side-Heated Enclosure using Lattice Boltzmann Method

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Numerical Simulation of Two-Layer Fluid Natural Convection in a Side-Heated Enclosure using Lattice Boltzmann Method

Content Provider	Semantic Scholar
Author	Haghshenas, Armin Rahimian, Mohammad Hassan
Copyright Year	2015
Abstract	In the present paper, natural convection in an enclosure of two immiscible fluids is simulated by lattice Boltzmann method with no a priori assumptions on the shape and dynamical role of the interface. Furthermore, the behavior of the interface is obtained as part of the solution. New two-phase thermal lattice Boltzmann method is proposed which is indeed the combination of isothermal two-phase lattice Boltzmann method and passive scalar approach. The present model is validated with the single-phase natural convection problem and good agreement is observed. The main objective of this study is to investigate the applicability of this new lattice Boltzmann model for simulating thermal two-phase problems. Furthermore, explicit influences of some nondimensional parameters are scrutinized. The flow patterns and temperature contours are visualized and averaged heat transfer coefficient along the vertical walls are obtained. It is found that with increase of Rayleigh number, the fluid motion becomes stronger and the isotherms are more distorted. Also with decrease of the aspect ratio and the ratio of Prandtl number of upper fluid to lower fluid, the circulating flow in both areas becomes weak. It is concluded that this new thermal lattice Boltzmann model has a great capability to model thermal two-phase problems.
File Format	PDF HTM / HTML
Alternate Webpage(s)	https://rtis2.ut.ac.ir/media/?activity_id=94133232&f_name=paper_upload&path=uploads/articles/papers/f201510251445763419.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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