Heat transfer enhancement via inhomogeneous thermal conductivity within vertical magnetohydrodynamic ducts

C. J. Camobreco; G. J. Sheard

Heat transfer enhancement via inhomogeneous thermal conductivity within vertical magnetohydrodynamic ducts

Mechanical & Aerospace Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference Paper › Other

Abstract

Inhomogeneous thermal conductivity disrupts the formation of the thermal boundary layer, increasing temperature gradients. This comes at the cost of reduced conducting area and natural convective velocities. However, at the low Prandtl numbers possessed by liquid metals (of order 10⁻²), such as fusion reactor breeder fluids, the former outweighs the latter, and heat transfer can be promoted. Quasi-two-dimensional mixed convection simulations of a magnetohydrodynamic vertical duct were performed in the Rayleigh number and interaction parameter ranges of 10² < Ra < 10⁴ (with constant Pr = 0.022) and 100 < N < 1600 respectively. Heat transfer enhancement was observed when buoyant forces (proportional to Ra) were sufficiently stronger than electromagnetic forces (proportional to N), which are imposed by the confining magnetic field.

Original language	English
Title of host publication	Proceedings of the 21st Australasian Fluid Mechanics Conference, AFMC 2018
Editors	Timothy C.W. Lau, Richard M. Kelso
Publisher	Australasian Fluid Mechanics Society
ISBN (Electronic)	9780646597843
Publication status	Published - 2018
Event	Australasian Fluid Mechanics Conference 2018 - Adelaide Convention Centre, Adelaide, Australia Duration: 10 Dec 2018 → 13 Dec 2018 Conference number: 21st https://aomevents.eventsair.com/QuickEventWebsitePortal/21st-australasian-fluid-mechanics-conference/afmc2018

Publication series

Name	Proceedings of the 21st Australasian Fluid Mechanics Conference, AFMC 2018

Conference

Conference	Australasian Fluid Mechanics Conference 2018
Abbreviated title	AFMC 2018
Country	Australia
City	Adelaide
Period	10/12/18 → 13/12/18
Internet address	https://aomevents.eventsair.com/QuickEventWebsitePortal/21st-australasian-fluid-mechanics-conference/afmc2018

Access to Document

Link to publication in Scopus

Cite this

Camobreco, C. J., & Sheard, G. J. (2018). Heat transfer enhancement via inhomogeneous thermal conductivity within vertical magnetohydrodynamic ducts. In T. C. W. Lau, & R. M. Kelso (Eds.), Proceedings of the 21st Australasian Fluid Mechanics Conference, AFMC 2018 (Proceedings of the 21st Australasian Fluid Mechanics Conference, AFMC 2018). Australasian Fluid Mechanics Society.

Camobreco, C. J. ; Sheard, G. J. / Heat transfer enhancement via inhomogeneous thermal conductivity within vertical magnetohydrodynamic ducts. Proceedings of the 21st Australasian Fluid Mechanics Conference, AFMC 2018. editor / Timothy C.W. Lau ; Richard M. Kelso. Australasian Fluid Mechanics Society, 2018. (Proceedings of the 21st Australasian Fluid Mechanics Conference, AFMC 2018).

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title = "Heat transfer enhancement via inhomogeneous thermal conductivity within vertical magnetohydrodynamic ducts",

abstract = "Inhomogeneous thermal conductivity disrupts the formation of the thermal boundary layer, increasing temperature gradients. This comes at the cost of reduced conducting area and natural convective velocities. However, at the low Prandtl numbers possessed by liquid metals (of order 10−2), such as fusion reactor breeder fluids, the former outweighs the latter, and heat transfer can be promoted. Quasi-two-dimensional mixed convection simulations of a magnetohydrodynamic vertical duct were performed in the Rayleigh number and interaction parameter ranges of 102 < Ra < 104 (with constant Pr = 0.022) and 100 < N < 1600 respectively. Heat transfer enhancement was observed when buoyant forces (proportional to Ra) were sufficiently stronger than electromagnetic forces (proportional to N), which are imposed by the confining magnetic field.",

author = "Camobreco, {C. J.} and Sheard, {G. J.}",

year = "2018",

language = "English",

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booktitle = "Proceedings of the 21st Australasian Fluid Mechanics Conference, AFMC 2018",

address = "Australia",

note = "Australasian Fluid Mechanics Conference 2018, AFMC 2018 ; Conference date: 10-12-2018 Through 13-12-2018",

url = "https://aomevents.eventsair.com/QuickEventWebsitePortal/21st-australasian-fluid-mechanics-conference/afmc2018",

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Camobreco, CJ & Sheard, GJ 2018, Heat transfer enhancement via inhomogeneous thermal conductivity within vertical magnetohydrodynamic ducts. in TCW Lau & RM Kelso (eds), Proceedings of the 21st Australasian Fluid Mechanics Conference, AFMC 2018. Proceedings of the 21st Australasian Fluid Mechanics Conference, AFMC 2018, Australasian Fluid Mechanics Society, Australasian Fluid Mechanics Conference 2018, Adelaide, Australia, 10/12/18.

Heat transfer enhancement via inhomogeneous thermal conductivity within vertical magnetohydrodynamic ducts. / Camobreco, C. J.; Sheard, G. J.

Proceedings of the 21st Australasian Fluid Mechanics Conference, AFMC 2018. ed. / Timothy C.W. Lau; Richard M. Kelso. Australasian Fluid Mechanics Society, 2018. (Proceedings of the 21st Australasian Fluid Mechanics Conference, AFMC 2018).

Research output: Chapter in Book/Report/Conference proceeding › Conference Paper › Other

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AB - Inhomogeneous thermal conductivity disrupts the formation of the thermal boundary layer, increasing temperature gradients. This comes at the cost of reduced conducting area and natural convective velocities. However, at the low Prandtl numbers possessed by liquid metals (of order 10−2), such as fusion reactor breeder fluids, the former outweighs the latter, and heat transfer can be promoted. Quasi-two-dimensional mixed convection simulations of a magnetohydrodynamic vertical duct were performed in the Rayleigh number and interaction parameter ranges of 102 < Ra < 104 (with constant Pr = 0.022) and 100 < N < 1600 respectively. Heat transfer enhancement was observed when buoyant forces (proportional to Ra) were sufficiently stronger than electromagnetic forces (proportional to N), which are imposed by the confining magnetic field.

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