Details

Autor(en) / Beteiligte

• Hansda, Samrat
• Pandit, Swapan K.
• Sheu, Tony W. H.

Titel

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

Ist Teil von

• Journal of thermal analysis and calorimetry, 2022-06, Vol.147 (12), p.7007-7029

Ort / Verlag

Cham: Springer International Publishing

Erscheinungsjahr

2022

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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.