{"id":{"repo_id":"nps","oai_identifier":"oai:calhoun.nps.edu:10945/15821"},"canonical_url":"https://search.dev.ndltd.org/etd/nps/oai:calhoun.nps.edu:10945/15821","repository":{"repo_id":"nps","name":"Naval Postgraduate School","base_url":"https://calhoun.nps.edu/server/oai/request"},"display":{"title":"Natural convection heat transfer from a horizontal disk in a cylindrical enclosure","abstract":"This thesis studied natural convection in water from a horizontal mirror finished disk, heated in the center and surrounded by a cylindrical enclosure. The test section was designed to insure a one dimensional heat flux. Measurements were taken with power inputs varying from 25 to 5 watts. Fluid depth had a definite effect on the heat transfer. An apparent maximum value existed at a ratio of enclosure radius to fluid depth of one. Comparison of the data with existing correlation however, was poor which led to the questioning of the validity of the assumed one dimensional heat flux. Use of a finite element computer program demonstrated that two dimensional effects were important. Subsequent modification of the hear transfer coefficient to account for this variation gave a correlation more in agreement with those existing in the literature.","abstract_html":"This thesis studied natural convection in water from a horizontal mirror finished disk, heated in the center and surrounded by a cylindrical enclosure. The test section was designed to insure a one dimensional heat flux. Measurements were taken with power inputs varying from 25 to 5 watts. Fluid depth had a definite effect on the heat transfer. An apparent maximum value existed at a ratio of enclosure radius to fluid depth of one. Comparison of the data with existing correlation however, was poor which led to the questioning of the validity of the assumed one dimensional heat flux. Use of a finite element computer program demonstrated that two dimensional effects were important. Subsequent modification of the hear transfer coefficient to account for this variation gave a correlation more in agreement with those existing in the literature.","abstract_has_math":false,"creators":["Duncan, Duane Stewart Jr."],"institution":"Monterey, California; Naval Postgraduate School","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":"Mechanical Engineering","school":null,"contributors":[],"advisors":["Marto, P.J."],"committee_chairs":[],"committee_members":[],"year":1971,"date_issued":"1971-12","date_published":"1971-12","updated_at":"2026-07-27T20:26:16Z","subjects":[],"languages":["en_US"],"rights":["This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. 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Use of a finite element computer program demonstrated that two dimensional effects were important. Subsequent modification of the hear transfer coefficient to account for this variation gave a correlation more in agreement with those existing in the literature."]},{"key":"dc:title","label":"Title","values":["Natural convection heat transfer from a horizontal disk in a cylindrical enclosure"]}]}],"canonical_facts":{"dc:contributor.advisor":["Marto, P.J."],"dc:contributor.department":["Mechanical Engineering"],"dc:creator":["Duncan, Duane Stewart Jr."],"dc:date":["December 1971"],"dc:date.accessioned":["2012-11-13T23:24:43Z"],"dc:date.available":["2012-11-13T23:24:43Z"],"dc:date.issued":["1971-12"],"dc:description.abstract":["This thesis studied natural convection in water from a horizontal mirror finished disk, heated in the center and surrounded by a cylindrical enclosure. The test section was designed to insure a one dimensional heat flux. Measurements were taken with power inputs varying from 25 to 5 watts. Fluid depth had a definite effect on the heat transfer. An apparent maximum value existed at a ratio of enclosure radius to fluid depth of one. Comparison of the data with existing correlation however, was poor which led to the questioning of the validity of the assumed one dimensional heat flux. Use of a finite element computer program demonstrated that two dimensional effects were important. Subsequent modification of the hear transfer coefficient to account for this variation gave a correlation more in agreement with those existing in the literature."],"dc:identifier.uri":["https://hdl.handle.net/10945/15821"],"dc:language.iso":["en_US"],"dc:publisher":["Monterey, California; Naval Postgraduate School"],"dc:rights":["This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. 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