Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
SIMULATION OF BOILING HEAT TRANSFER USING A HYBRID PSEUDOPOTENTIAL LATTICE BOLTZMANN METHOD
Submission Author:
Matheus Guzella , MG
Co-Authors:
Matheus Guzella, Luiz Czelusniak, Vinicius Pessoa Mapelli, Luben Cabezas Gómez
Presenter: Matheus Guzella
doi://10.26678/ABCM.COBEM2019.COB2019-1126
Abstract
In this paper, mesoscopic simulations of boiling heat transfer are performed using a Hybrid Pseudopotential Lattice Boltzmann Method. In this model, the hydrodynamic equations are solved using the Pseudopotential Lattice Boltzmann Method (Shan-Chen Model) and the energy equation is solved by the 4th order Runge-Kutta Method. The collision operator is computed from the Bhatnagar-Gross-Krook model. Two-dimensional simulation results are presented first for the nucleation of a single bubble in the center of the heated surface. Results for the nucleation, growth and departure for a single bubble are presented, whereas bubble departure diameter and release period are compared with data from the literature. Later, qualitative results of boiling heat transfer are presented and discussed. Different surface superheating degrees are considered in order to assess the numerical model. Also, different surface wettability conditions are investigated by tuning a parameter which control the solid-fluid interaction.
Keywords
Boiling Heat Transfer, Lattice Boltzmann method, Pseudopotential
