Lattice Boltzmann method to simulate convection heat transfer in a microchannel under heat flux Gravity and inclination angle on slip-velocity

• Published in: International journal of numerical methods for heat & fluid flow Vol. 30; no. 6; pp. 3371 - 3398
• Main Authors: Mozaffari, Masoud, Annunziata D’Orazio, Karimipour, Arash, Abdollahi, Ali, Safaei, Mohammad Reza
• Format: Journal Article
• Language: English
• Published: Bradford Emerald Group Publishing Limited 01.06.2020
• Subjects: Air flow; Boltzmann transport equation; Boundary conditions; Convection; Cooling; Distribution functions; Gas flow; Gravity; Heat flux; Heat transfer; Hydrodynamics; Microchannels; Reynolds number; Simulation; Slip flow; Supercomputers; Velocity; Viscosity
• ISSN: 0961-5539; 1758-6585
• DOI: 10.1108/HFF-12-2018-0821

PurposeThe purpose of this paper is to improve the lattice Boltzmann method’s ability to simulate a microflow under constant heat flux.Design/methodology/approachDevelop the thermal lattice Boltzmann method based on double population of hydrodynamic and thermal distribution functions.FindingsThe buoyancy forces, caused by gravity, can change the hydrodynamic properties of the flow. As a result, the gravity term was included in the Boltzmann equation as an external force, and the equations were rewritten under new conditions.Originality/valueTo the best of the authors’ knowledge, the current study is the first attempt to investigate mixed-convection heat transfer in an inclined microchannel in a slip flow regime.