Natural convection of magnetic fluid in a rectangular Hele-Shaw cell of different aspect ratios

Chih-yung Wen; R. T. Tsai; K. P. Leong

doi:10.1016/j.phpro.2010.11.041

Natural convection of magnetic fluid in a rectangular Hele-Shaw cell of different aspect ratios

Chih-yung Wen, R. T. Tsai, K. P. Leong

Research output: Journal article publication › Journal article › Academic research › peer-review

5 Citations (Scopus)

Abstract

The nature convection of a magnetic fluid in a rectangular Hele-Shaw cell with an imposition of an even vertical magnetic field is studied experimentally. Heat transfer measurements with thermocouples and flow visualization with liquid crystal thermography are conducted in Hele-Shaw cells of aspect ratios 1.0, 1.5, and 2.0. Both results show that the vertically imposed magnetic field has destabilizing influence. The flow instability modes become different from that in two-dimensional cavity cases, with and without the magnetic field. A pair of symmetric counter-rotating vortices is observed for the first instability mode. Increasing the aspect ratio destabilizes the flow. Second instability mode is observed in the cases of aspect ratios 1.0 and 1.5, but not in 2.0.

Original language	English
Pages (from-to)	181-185
Number of pages	5
Journal	Physics Procedia
Volume	9
DOIs	https://doi.org/10.1016/j.phpro.2010.11.041
Publication status	Published - 1 Jan 2010
Externally published	Yes

Keywords

Hele-Shaw cell
Liquid crystal thermography
Magnetic fluid
Natural convection

ASJC Scopus subject areas

General Physics and Astronomy

More information

10.1016/j.phpro.2010.11.041

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title = "Natural convection of magnetic fluid in a rectangular Hele-Shaw cell of different aspect ratios",

abstract = "The nature convection of a magnetic fluid in a rectangular Hele-Shaw cell with an imposition of an even vertical magnetic field is studied experimentally. Heat transfer measurements with thermocouples and flow visualization with liquid crystal thermography are conducted in Hele-Shaw cells of aspect ratios 1.0, 1.5, and 2.0. Both results show that the vertically imposed magnetic field has destabilizing influence. The flow instability modes become different from that in two-dimensional cavity cases, with and without the magnetic field. A pair of symmetric counter-rotating vortices is observed for the first instability mode. Increasing the aspect ratio destabilizes the flow. Second instability mode is observed in the cases of aspect ratios 1.0 and 1.5, but not in 2.0.",

keywords = "Hele-Shaw cell, Liquid crystal thermography, Magnetic fluid, Natural convection",

author = "Chih-yung Wen and Tsai, {R. T.} and Leong, {K. P.}",

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doi = "10.1016/j.phpro.2010.11.041",

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journal = "Physics Procedia",

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T1 - Natural convection of magnetic fluid in a rectangular Hele-Shaw cell of different aspect ratios

AU - Wen, Chih-yung

AU - Tsai, R. T.

AU - Leong, K. P.

PY - 2010/1/1

Y1 - 2010/1/1

N2 - The nature convection of a magnetic fluid in a rectangular Hele-Shaw cell with an imposition of an even vertical magnetic field is studied experimentally. Heat transfer measurements with thermocouples and flow visualization with liquid crystal thermography are conducted in Hele-Shaw cells of aspect ratios 1.0, 1.5, and 2.0. Both results show that the vertically imposed magnetic field has destabilizing influence. The flow instability modes become different from that in two-dimensional cavity cases, with and without the magnetic field. A pair of symmetric counter-rotating vortices is observed for the first instability mode. Increasing the aspect ratio destabilizes the flow. Second instability mode is observed in the cases of aspect ratios 1.0 and 1.5, but not in 2.0.

AB - The nature convection of a magnetic fluid in a rectangular Hele-Shaw cell with an imposition of an even vertical magnetic field is studied experimentally. Heat transfer measurements with thermocouples and flow visualization with liquid crystal thermography are conducted in Hele-Shaw cells of aspect ratios 1.0, 1.5, and 2.0. Both results show that the vertically imposed magnetic field has destabilizing influence. The flow instability modes become different from that in two-dimensional cavity cases, with and without the magnetic field. A pair of symmetric counter-rotating vortices is observed for the first instability mode. Increasing the aspect ratio destabilizes the flow. Second instability mode is observed in the cases of aspect ratios 1.0 and 1.5, but not in 2.0.

KW - Hele-Shaw cell

KW - Liquid crystal thermography

KW - Magnetic fluid

KW - Natural convection

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U2 - 10.1016/j.phpro.2010.11.041

DO - 10.1016/j.phpro.2010.11.041

M3 - Journal article

SN - 1875-3884

VL - 9

SP - 181

EP - 185

JO - Physics Procedia

JF - Physics Procedia

ER -

Natural convection of magnetic fluid in a rectangular Hele-Shaw cell of different aspect ratios

Abstract

Keywords

ASJC Scopus subject areas

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