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Research Papers: Natural and Mixed Convection

# Natural Convection in a Rocking Square Enclosure: Experimental Results

[+] Author and Article Information
R. Chávez

Department of Thermofluids, Mechanical and Industrial Division, Engineering School, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510, México D.F., Méxicorafacham@comunidad.unam.mx

F. J. Solorio1

Department of Thermofluids, Mechanical and Industrial Division, Engineering School, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510, México D.F., Méxicofjso@servidor.unam.mx

J. G. Cervantes

Department of Thermofluids, Mechanical and Industrial Division, Engineering School, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510, México D.F., Méxicojgonzalo@servidor.unam.mx

1

Corresponding author.

J. Heat Transfer 133(7), 072501 (Apr 06, 2011) (10 pages) doi:10.1115/1.4003554 History: Received August 05, 2010; Revised January 19, 2011; Published April 06, 2011; Online April 06, 2011

## Abstract

Experimental results for the natural convection in a rocking enclosure are presented. A square closed cavity heated from below and cooled from above periodically turns around of its horizontal symmetry central line. The oscillation amplitude was from −15 deg to 15 deg, and four time periods were employed (30 min, 60 min, 90 min, and 120 min) for three established Rayleigh numbers ($3×104$, $6×104$, and $1×105$). High purity glycerin was used as the working fluid, and particle image velocimetry (PIV) was employed to obtain the velocity fields. The obtained flow patterns have a strong dependence on the Rayleigh number.

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## Figures

Figure 1

Oscillatory squared cavity heated from below and cooled from above

Figure 2

Oscillating framework

Figure 3

Motion control system

Figure 4

Streamlines for Ra=3×104, oscillation period 30 min

Figure 5

Streamlines for Ra=3×104, oscillation period 120 min

Figure 6

Streamlines for Ra=6×104, oscillation period 30 min

Figure 7

Streamlines for Ra=6×104, oscillation period 120 min

Figure 8

Streamlines for Ra=1×105, oscillation period 30 min

Figure 9

Streamlines for Ra=1×105, oscillation period 120 min

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