Transient removal of contaminants in cavity of mixed convection in a channel by constrained interpolated profile method

Abstract

Research in contaminated fluid flow becomes an interest in fluid dynamic research recently. In pipeline involving mix solution, residues can accumulate and deposit usually trapped inside the pipeline. This problem was studied by model it as a cavity channel flow with small particles inside the cavity enhanced by mixed convection. Constrained interpolated profile (CIP) was used to solve advection part of momentum equation while non-advection was solved by using finite difference for fluid part. Passive particles were located inside a square cavity in a channel represent contaminant in the cavity. Bottom wall of the cavity was heated to create mixed convection effect in the removal process and represent by various Grashof number. Validation study was done with experimental study at isothermal condition and show good comparison to present study. Higher removal process was observed at higher Grashof number. In the beginning of removal process, the contaminants were removed faster but after some period, the removal rate began to slow down and steady stated was achieved. At steady state, there will be no more removal of particle and it will remain circulate in the cavity.