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Technical Brief

Analysis of Particle Image Velocimetry Measurements of Natural Convection in an Enclosure Using Proper Orthogonal Decomposition

[+] Author and Article Information
Nirmalendu Biswas

Department of Mechanical Engineering,
Jadavpur University,
Kolkata 700032, India
e-mail: nirmalendubiswas@yahoo.co.in

Souvick Chatterjee

Department of Biomedical Engineering and Mechanics,
Virginia Tech,
Blacksburg, VA 24061
e-mail: souvickchat@gmail.com

Mithun Das

Department of Mechanical Engineering,
Jadavpur University,
Kolkata 700032, India
e-mail: mdas190@gmail.com

Amlan Garai

Department of Mechanical Engineering,
Jadavpur University,
Kolkata 700032, India
e-mail: amlangarai@gmail.com

Prokash C. Roy

Department of Mechanical Engineering,
Jadavpur University,
Kolkata 700032, India
e-mail: prokash.roy@gmail.com

Achintya Mukhopadhyay

Department of Mechanical Engineering,
Jadavpur University,
Kolkata 700032, India
e-mail: achintya.mukho@gmail.com

1Corresponding author.

Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received May 30, 2014; final manuscript received November 20, 2014; published online August 11, 2015. Assoc. Editor: Suman Chakraborty.

J. Heat Transfer 137(12), 124502 (Aug 11, 2015) (4 pages) Paper No: HT-14-1366; doi: 10.1115/1.4030957 History: Received May 30, 2014

This work investigates natural convection in an enclosure with localized heating on the bottom wall with a flushed or protruded heat source and cooled on the top and the side walls. Velocity field measurements are done by using 2D particle image velocimetry (PIV) technique. Proper orthogonal decomposition (POD) has been used to create low dimensional approximations of the system for predicting the flow structures. The POD-based analysis reveals the modal structure of the flow field and also allows reconstruction of velocity field at conditions other than those used in PIV study.

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References

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Figures

Grahic Jump Location
Fig. 1

Schematic diagram of the experimental setup

Grahic Jump Location
Fig. 2

Velocity contour (a) from PIV results and (b) reconstructed using POD for e/H = 0.11 and Ra = 1.35 × 107

Grahic Jump Location
Fig. 3

Velocity contour for (a) mode—1 (mean), (b) mode—2, (c) mode—3, and (d) mode—4 at Ra = 7.58 × 106, protruded heater configuration (e/H = 0.11)

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