Liquid Metal Heat Transfer Investigations Applied to Tokamak Reactor

Abstract

The liquid metal (LM) investigations of hydrodynamics and heat transfer affected by longitudinal and transverse magnetic field (MF) were carried out. The current experiments program deals with temperature and velocity fields, local and average heat transfer intensities, temperature fluctuation intensities in a horizontal heated tube. The strong influence of thermo gravitational convection (TGC) in all regimes was observed in experiments applied to blanket and divertor of tokamak. Two unexpected troubles were discovered: zones of extremely low local heat transfer intensities in some regimes of MF and TGC joint influence; dangerous temperature low-frequent fluctuations with high amplitude near the tube wall in some MHD configurations with TGC affect. Numerical simulation of magneto hydrodynamic (MHD) heat transfer is working out simultaneously with experiments.

Heat Transfer Investigation at Liquid Metal Flowing in Fusion Reactor Conditions

“…Опытные данные и результаты численного моделирования, полученные в других конфигурациях течения в МП, например, в горизонтальной трубе при обогреве только нижней половины периметра [14,15], подтверждают устойчивое существование в потоке вихревых образований с осями, параллельными вектору индукции МП. Подобные структуры были обнаружены и под-робно исследовались в работах [22,23].…”

“…Стоит отметить, что в большинстве работ подробно не рассматрива-ется влияние ТГК на осреднённые величины и практически отсутствует информация о влиянии на пульса-ционные характеристики. Согласно исследованиям [14,15] результат влияния ТГК в трубах и каналах МП весьма значительный, неоднозначный и зависит от конфигурации течения по отношению к векторам уско-рения свободного падения g и индукции магнитного поля В, а также от распределения теплового потока в сечении канала q c (однородный, односторонний, двухсторонний).…”

Investigating the Impact of Magnetic Fields and Pulsating Pressure on Non-Newtonian Fluid Flow in Symmetric/Asymmetric Corrugated Microchannels

“…As such, it is an exciting and dynamic field that has the potential to shape the future of many industries. [1][2][3][4] This research focuses on fluid dynamics in microdevices, highlighting the significance of driving forces, geometry, and surface chemistry. It examines the interaction of physical phenomena such as pressure gradients, electrokinetics, and capillarity, and their effect on fluid flows in microfluidic devices.…”

Investigation of heat transfer during magnetohydrodynamic flow of liquid metal in the “pipe in channel” heat exchange system

“…The results reveal a strong influence of thermogravitational convection (TGC) and external MF, which combined action leads to unpredictable effects that determine the mechanisms of MHD and heat transfer of channel flows, both averaged and pulsating [6]. Numerical modeling of hydrodynamics and heat transfer of experimentally solved problems is also carried out by the methods of RANS [7] and DNS [8]. Using the methods of similarity theory, these data can be transferred to other heat carriers, for example, to lead and its alloys.…”