{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/71673"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/71673","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Studies in Unsteady Penetrative Thermal Convection","abstract":"This study concentrates on the dynamics and structure of turbulence in the interfacial region and the upper part of a mixed layer which is capped by a linearly stratified, non-turbulent region. Measurements of the local, instantaneous values of the temperature, the vertical velocity and horizontal velocity have been made using a thermocouple and a two-component dual beam laser Doppler velocimeter.","abstract_html":"This study concentrates on the dynamics and structure of turbulence in the interfacial region and the upper part of a mixed layer which is capped by a linearly stratified, non-turbulent region. Measurements of the local, instantaneous values of the temperature, the vertical velocity and horizontal velocity have been made using a thermocouple and a two-component dual beam laser Doppler velocimeter.","abstract_has_math":false,"creators":["Kumar, Ranganathan"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Theoretical and Applied Mechanics","degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2014,"date_issued":"2014-12-16T19:12:29Z","date_published":"2014-12-16T19:12:29Z","updated_at":"2026-07-22T22:26:05Z","subjects":["Applied Mechanics"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["(UMI)AAI8324590"],"render_values":[{"text":"(UMI)AAI8324590","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/71673","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Kumar, Ranganathan"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2014-12-16T19:12:29Z","10000-01-01","1983"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Theoretical and Applied Mechanics"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Applied Mechanics"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/71673","(UMI)AAI8324590"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["This study concentrates on the dynamics and structure of turbulence in the interfacial region and the upper part of a mixed layer which is capped by a linearly stratified, non-turbulent region. Measurements of the local, instantaneous values of the temperature, the vertical velocity and horizontal velocity have been made using a thermocouple and a two-component dual beam laser Doppler velocimeter.","Vertical profiles of all relevant one-point moment including joint temperature-velocity moments up to fourth order have been obtained. Mean temperature measurements have been made for various kinematic heat flux settings to understand the thermal structure in the entrainment zone. Conditional averaging techniques and probability density functions have been employed to infer the properties of fluid elements in the mixed layer. A length scale in the interfacial layer, based on the temperature gradient in the stable region has been proposed.","Power spectra for velocity and temperature have been analyzed to check the possible existence of inertial subrange and estimate the noise level. With the aid of flow visualization, a phenomenological model of penetrative convection for low entrainment rate has been developed.","Made available in DSpace on 2014-12-16T19:12:29Z (GMT). No. of bitstreams: 1 8324590.pdf: 4128470 bytes, checksum: df63910a46aaa17a36ec5ab6e9b82b9f (MD5) Previous issue date: 1983","Embargo set by: Seth Robbins for item 71839 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","U of I Only","165 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1983."]},{"key":"dc:title","label":"Title","values":["Studies in Unsteady Penetrative Thermal Convection"]}]}],"canonical_facts":{"dc:creator":["Kumar, Ranganathan"],"dc:date":["2014-12-16T19:12:29Z","10000-01-01","1983"],"dc:description":["This study concentrates on the dynamics and structure of turbulence in the interfacial region and the upper part of a mixed layer which is capped by a linearly stratified, non-turbulent region. Measurements of the local, instantaneous values of the temperature, the vertical velocity and horizontal velocity have been made using a thermocouple and a two-component dual beam laser Doppler velocimeter.","Vertical profiles of all relevant one-point moment including joint temperature-velocity moments up to fourth order have been obtained. Mean temperature measurements have been made for various kinematic heat flux settings to understand the thermal structure in the entrainment zone. Conditional averaging techniques and probability density functions have been employed to infer the properties of fluid elements in the mixed layer. A length scale in the interfacial layer, based on the temperature gradient in the stable region has been proposed.","Power spectra for velocity and temperature have been analyzed to check the possible existence of inertial subrange and estimate the noise level. With the aid of flow visualization, a phenomenological model of penetrative convection for low entrainment rate has been developed.","Made available in DSpace on 2014-12-16T19:12:29Z (GMT). No. of bitstreams: 1 8324590.pdf: 4128470 bytes, checksum: df63910a46aaa17a36ec5ab6e9b82b9f (MD5) Previous issue date: 1983","Embargo set by: Seth Robbins for item 71839 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","U of I Only","165 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1983."],"dc:identifier":["http://hdl.handle.net/2142/71673","(UMI)AAI8324590"],"dc:subject":["Applied Mechanics"],"dc:title":["Studies in Unsteady Penetrative Thermal Convection"],"dc:type":["text"],"thesis:degree_discipline":["Theoretical and Applied Mechanics"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:26:05Z"}