3D modelling of MHD mixed convection flow in a vertical duct with transverse magnetic field and volumetric or surface heating

Rhodes, Tyler J.; Pulugundla, Gautam; Smolentsev, Sergey; Abdou, Mohamed

doi:10.1016/j.fusengdes.2020.111834

Title: 3D modelling of MHD mixed convection flow in a vertical duct with transverse magnetic field and volumetric or surface heating

Journal Article · Wed Jul 01 00:00:00 EDT 2020 · Fusion Engineering and Design

DOI:https://doi.org/10.1016/j.fusengdes.2020.111834· OSTI ID:1849926

Rhodes, Tyler J. ^[1];

^[1]; Smolentsev, Sergey ^[1];

^[1]

Univ. of California, Los Angeles, CA (United States). Mechanical and Aerospace Engineering Dept.

Understanding phenomena associated with the multiple effects/interactions of the fusion nuclear environment on liquid metal flow is required to correctly design liquid metal (LM) blankets for fusion facilities. These effects are investigated in the present work by numerically simulating 3D LM MHD flow. The simulated geometry consists of a straight, vertical duct which runs perpendicular to a strong, fringing applied magnetic field. There is also a region of applied heating as the primary goal is to explore buoyancy effects in MHD duct flows. Results are presented for both buoyancy assisted (upwards) and buoyancy opposed (downwards) flows in conducting and insulating ducts for a range of Hartmann numbers (Ha) up to 100, Reynolds numbers (Re) from 10³ to 10⁴ and Grashof (Gr) numbers from 10⁷ to 10⁸. While increasing Gr or decreasing Re increases buoyancy effects, increasing Ha was shown to increase maximum temperature through turbulence reduction. The extent to which the MHD mixed convection flows are quasi-2D is analyzed and buoyant effects, in competition with electromagnetic forces, are shown to bring about 3D flow features not seen in purely MHD flows. Volumetric nuclear heating with steep gradients is applied to the vertical MHD flows for comparison to flows with surface heating only. Finally, surface heating generates stronger buoyancy effects than volumetric heating of the same total power; however, many of the same phenomena occur. Therefore, surface heating, the only option for lab experiments, can provide indication of the effects of volumetric heating in MHD flows.

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Research Organization:: Univ. of California, Los Angeles, CA (United States); Univ. of California, Oakland, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Grant/Contract Number:: FG02-86ER52123; AC02-05CH11231

OSTI ID:: 1849926

Alternate ID(s):: OSTI ID: 1775561

Journal Information:: Fusion Engineering and Design, Vol. 160, Issue C; ISSN 0920-3796

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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42 ENGINEERING
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
Nuclear science & technology
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CFD

Data for: 3D Modelling of MHD Mixed Convection Flow in a Vertical Duct Rhodes, Tyler https://doi.org/10.17632/7ckkgswjpx.1 The current record is supplemented by this dataset	dataset	January 2020
Data for: 3D Modelling of MHD Mixed Convection Flow in a Vertical Duct Rhodes, Tyler https://doi.org/10.17632/7ckkgswjpx The current record is supplemented by this dataset	dataset	January 2020

Title: 3D modelling of MHD mixed convection flow in a vertical duct with transverse magnetic field and volumetric or surface heating

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