Turbulence and transport of passive scalar in magnetohydrodynamic channel flows with different orientations of magnetic field

Influence of oblique magnetic fields on the periodicity of large-scale intermittent states in channel flow

“…In a channel flow, the conducting fluid evolved between laminar and fully turbulent states due to the damping effect of the magnetic field. When it is laminar state, there is a uniform spanwise structure and no Joule dissipation is generated by the spanwise magnetic field [2]. However, as the flow develops and produces finite amplitude three-dimensional perturbations, it cyclically oscillates between the laminar and three-dimensional turbulent state [3].…”

“…When it is laminar state, there is a uniform spanwise structure and no Joule dissipation is generated by the spanwise magnetic field [2]. However, as the flow develops and produces finite amplitude three-dimensional perturbations, it cyclically oscillates between the laminar and three-dimensional turbulent state [3]. In channel flow, the damping effect of the spanwise and vertical channel magnetic fields on the streamwise velocity component is often observed, while the streamwise magnetic field usually increases the streamwise velocity component [2].…”

“…However, as the flow develops and produces finite amplitude three-dimensional perturbations, it cyclically oscillates between the laminar and three-dimensional turbulent state [3]. In channel flow, the damping effect of the spanwise and vertical channel magnetic fields on the streamwise velocity component is often observed, while the streamwise magnetic field usually increases the streamwise velocity component [2]. The suppression effect of the spanwise and vertical channel magnetic fields is exerted on the fluid through Joule dissipation generated by conducting fluids flowing through the magnetic field [2,3].…”

Numerical Solutions of Heat Transfer for Magnetohydrodynamic Jeffery-Hamel Flow Using Spectral Homotopy Analysis Method

“…Magnetohydrodynamics (MHD) is the study of the interaction between a magnetic field and a moving conducting fluid. Applications of MHD flow include MHD generators, liquid metals, pumps, flow meters and several other engineering works [9][10][11]. Some of these applications involve Jeffery Hamel flows and thus motivate our study.…”

Modeling of MHD turbulent heat transfer in channel flows imposed wall-normal magnetic fields under the various Prandtl number fluids

“…To predict heat transfer degradation during the design process, we attach much value to Reynolds-averaged Navier-Stokes simulation (RANS) [3][4][5]. From this viewpoint, high accuracy models [6,7] of MHD source terms appearing in both the transport equations of turbulent kinetic energy and the turbulent energy dissipation rate have been proposed and passive scalar transport in MHD channel flows of low-Prandlt (Pr) number fluids have been investigated [8,9] by means of Direct numerical simulation (DNS). However, a turbulent heat transfer model under the MHD effects for the high-Pr fluid such as FLiBe has been an unexamined issue until now.…”