Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
3D numerical simulations of natural convection in cavities using adaptive mesh refinement
Submission Author:
Bernardo Alan Duarte , MG
Co-Authors:
Aristeu Silveira Neto, Bernardo Alan Duarte
Presenter: Bernardo Alan Duarte
doi://10.26678/ABCM.COBEM2017.COB17-0463
Abstract
This work presents 3D numerical simulations of natural convection using adaptive mesh refinement for one-phase flow. Temperature gradient is used as refinement criteria. Flow is represented by Navier-Stokes and energy equation which is solved for temperature. The model is applied to predict thermal exchange rate between the fluid and a wall kept at a fixed temperature. Nusselt number calculations and flow evolution presented good agreement with literature and demonstrated the validity of the present model. Temperature gradient criteria guided adequately mesh refinement evolution and promoted accurate results. Computational efficiency calculated demonstrated that simulations with adaptive mesh refinement presented lower costs than simulations with uniform grid. AMR simulations were 34% faster compared to uniform grid simulations and required ten times less computational cells.
Keywords
Nusselt number, thermal transfer, AMR, CFD
