Research Papers: Forced Convection

A Nondimensional Analysis to Characterize Thermomagnetic Convection of a Temperature Sensitive Magnetic Fluid in a Flow Loop

[+] Author and Article Information
Giti Karimi-Moghaddam

Department of Mechanical and
Aerospace Engineering,
North Carolina State University,
Raleigh, NC 27695
e-mail: gkarimi@ncsu.edu

Richard D. Gould

Department of Mechanical and
Aerospace Engineering,
North Carolina State University,
Raleigh, NC 27695
e-mail: gould@ncsu.edu

Subhashish Bhattacharya

Department of Electrical and
Computer Engineering,
North Carolina State University,
Raleigh, NC 27695
e-mail: sbhatta4@ncsu.edu

1Corresponding author.

Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received July 25, 2013; final manuscript received June 11, 2014; published online June 27, 2014. Assoc. Editor: William P. Klinzing.

J. Heat Transfer 136(9), 091702 (Jun 27, 2014) (7 pages) Paper No: HT-13-1370; doi: 10.1115/1.4027863 History: Received July 25, 2013; Revised June 11, 2014

This paper presents results from theoretical and numerical studies of a single-phase, temperature sensitive magnetic fluid operating under steady-state laminar flow conditions in a partially heated thermomagnetic circulation loop under the influence of an external magnetic field (created by a solenoid). A one-dimensional theoretical model has been developed using scaling arguments to characterize thermomagnetic circulation in this loop in terms of the geometric length scales, magnetic fluid properties, and the strength of the imposed magnetic field. In parallel to this theoretical analysis, supporting numerical simulations using Comsol Multiphysics simulation software have been undertaken to obtain data for use in this 1D model. Comparison between experimental data and numerical simulation results and also a grid sensitivity analysis was carried out to validate the numerical simulation. A correlation for the nondimensional heat transfer (Nusselt number) as a function of the appropriate magnetic Rayleigh number and a correlation for the mass flow rate based on the system's properties are developed.

Copyright © 2014 by ASME
Your Session has timed out. Please sign back in to continue.



Grahic Jump Location
Fig. 1

Schematic diagram for the rectangular thermomagnetic circulation loop

Grahic Jump Location
Fig. 2

Schematic layout of the thermomagnetic circulation flow loop used in the experimental examinations

Grahic Jump Location
Fig. 3

Comparison between experimental and numerical results for the ferrofluid temperatures in upstream (US) and DS of the heat source section

Grahic Jump Location
Fig. 4

Contour of the centerline fluid temperature

Grahic Jump Location
Fig. 5

Contour and vectors of the centerline fluid velocity

Grahic Jump Location
Fig. 6

Dependence of Reynolds number on product of the magnetic Grashof number and diameter to length of the flow loop tube

Grahic Jump Location
Fig. 7

Dependence of Nusselt number on magnetic Rayleigh number




Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In