Thermosolutal discharge of double diffusion mixed convection flow with Brownian motion of nanoparticles in a wavy chamber

In this paper, we have conducted a numerical investigation to investigate thermal and solutal performances of thermosolutal mixed convection flow in a wavy chamber with the influence of Brownian motion of nanoparticles. The Cu-water nanofluid is used to fill the chamber. The bottom boundary is nonun...

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Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2022-06, Vol.147 (12), p.7007-7029
Main Authors: Hansda, Samrat, Pandit, Swapan K., Sheu, Tony W. H.
Format: Article
Language:English
Subjects:
Analytical Chemistry
Brownian motion
Chambers
Chemistry
Chemistry and Materials Science
Convection
Electric properties
Finite difference method
Fluid flow
Grashof number
Heat transfer
Incompressible flow
Inorganic Chemistry
Mass transfer
Measurement Science and Instrumentation
Nanofluids
Nanoparticles
Physical Chemistry
Polymer Sciences
Richardson number
Thermal conductivity
Viscous flow
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Summary:In this paper, we have conducted a numerical investigation to investigate thermal and solutal performances of thermosolutal mixed convection flow in a wavy chamber with the influence of Brownian motion of nanoparticles. The Cu-water nanofluid is used to fill the chamber. The bottom boundary is nonuniformly concentrated and heated while the other boundaries of the chamber are fixed at constant low concentration and cold temperature. The upper and lower walls of the chamber are in motion with constant velocity. Depending on the directions of motion of the upper and lower walls, we have considered four cases. The governing equations representing incompressible viscous flows are the Navier–Stokes (N–S) equations in the form of mass, momentum, temperature and concentration equations. A compact finite difference scheme is adopted to solve those equations. We have applied KKL model of Koo-Kleinstreuer and Li for taking into account the effects of Brownian motion of Cu-water nanofluid properties in addition to the effective thermal conductivity and the dynamic viscosity. The numerical results are explored for getting a better understanding of the effects of thermal Grashof number ( Gr T = 10 4 ), Buoyancy ratio number ( N = 1 ), Richardson number ( 0.1 ≤ Ri ≤ 10.0 ), Lewis number ( 1 ≤ Le ≤ 10 ), the wavy surface amplitude ( 0.0 ≤ λ ≤ 0.06 ), solid volume fraction ( 0.0 ≤ ϕ ≤ 0.04 ) and undulation number of the vertical walls ( 0 ≤ d ≤ 2 ). Results reveal that nanoparticles are responsible for the enhancement of heat transfer and the decrement of mass transfer.
ISSN:1388-6150
1588-2926
DOI:10.1007/s10973-021-10971-4