Direct numerical simulation of Mhd heat transfer of the liquid metal in a horizontal pipe with the joint effect of the longitudinal magnetic field and thermo-gravitational convection

Akhmedagaev Ruslan,Listratov Yaroslav,S.V Alekseenko

doi:10.1051/matecconf/201711502016

Akhmedagaev Ruslan, Listratov Yaroslav + Show 1 more

Open Access

https://doi.org/10.1051/matecconf/201711502016

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Abstract

The results of the direct numerical simulation (DNS) of the MHD heat transfer in turbulent flow of liquid metal (LM) in a horizontal pipe under the joint influence of a longitudinal magnetic field (MF) and thermo-gravitational convection (TGC) are presented. Discusses the characteristics of hydrodynamics and heat transfer in the longitudinal MF in the absence of TGC. Suppression of turbulent transport is observed with an increase in the Hartmann number: the heat transfer coefficients, the friction coefficient. The authors calculated the effect of TGC in a strong longitudinal MF for a homogeneous heating. Investigated the averaged fields of velocity and temperature, heat transfer characteristics, the distribution of wall temperature along the perimeter of the cross section of the pipe. The effect of TGC on the velocity field is affected stronger than in the temperature field.

Highlights

The world community is working on the creation of an international experimental thermonuclear reactor (ITER), which is being built in Cadarache (France)
Today from experimental data [4] show that the longitudinal magnetic field (MF) delays the transition from laminar flow regime to turbulent and it is observed in the growth of the critical Reynolds number, which increases with Hartmann number
Let us consider the dependence of the friction coefficient on the Reynolds number and the effect of the longitudinal magnetic field on heat transfer

Summary

Introduction

The world community is working on the creation of an international experimental thermonuclear reactor (ITER), which is being built in Cadarache (France). In ITER liquid metal system will work if you have a very strong MF and the research problem of the regularities of hydrodynamics and heat transfer under such conditions at a current LM is very relevant [Ошибка! It’s planned to consider one-sided heating in order to study the hypothesis of the occurrence of anomalous temperature pulsations with increasing Hartmann number in the longitudinal MF. This hypothesis is described in detail for a transverse MF [2]

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