Open Access

ARTICLE

Convection and Stratification of Temperature and Concentration

by Alexey Fedyushkin^*

Laboratory of Complex Fluid Mechanics, Ishlinsky Institute for Problems in Mechanics RAS, Moscow, 119526, Russia

* Corresponding Author: Alexey Fedyushkin. Email:

(This article belongs to the Special Issue: Advanced Problems in Fluid Mechanics)

Fluid Dynamics & Materials Processing 2024, 20(6), 1351-1364. https://doi.org/10.32604/fdmp.2024.050267

Received 01 February 2024; Accepted 26 April 2024; Issue published 27 June 2024

Abstract

This study is devoted to an analysis of natural convection and the emergence of delamination in an incompressible fluid encapsulated in a closed region heated from the side. Weak, medium and intensive modes of stationary laminar thermal and thermo-concentration convection are considered. It is shown that nonlinear flow features can radically change the flow structure and characteristics of heat and mass transfer. Moreover, the temperature and concentration segregation in the center of the square region display a non-monotonic dependence on the Grashof number (flow intensity). The formation of a nonstationary periodic structure of thermal convection in boundary layers and in the core of a convective flow in the closed region is also examined. Details of the formation of countercurrents inside the region with the direction opposite to the main convective flow are given. Finally, the influence of vertical and horizontal vibrations on oscillatory convection is analyzed in detail.

---

Keywords

---