Flow visualization study of natural convection from a heated protrusion in a liquid filled rectangular enclosure.
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Authors
Knock, Rick Herman
Subjects
natural convection
rectangular enclosure
flow visualization
rectangular enclosure
flow visualization
Advisors
Kelleher, Matthew D.
Date of Issue
1983-12
Date
December 1983
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
A flow visualization study of natural convection in a
liquid filled rectangular enclosure with a small heater protruding into it from one vertical wall was conducted. The
top and bottom horizontal surfaces of the enclosure were
heat exchangers whose temperatures could be varied independently. The fluid in the enclosure was water. The Baker
electrochemical technique which utilizes a pH indicator was
used for flow visualization. Photographs were taken of the
two dimensional flow for three different locations of the
heater on the vertical wall. Nusselt numbers for each
heater location and for a range of Rayleigh numbers were
also determined. Visual results indicate the presence of
a dual-cell configuration within the enclosure. There is
a buoyancy driven upper cell and a shear driven lower cell.
The flow of the upper cell follows the geometry of the
enclosure. Though the uncertainty inherent in the experiment
was high data calculations suggest a trend that as the
heater is raised within the enclosure the Nusselt number
decreases.
Type
Thesis
Description
Series/Report No
Department
Mechanical Engineering
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.