{"id":{"repo_id":"vt","oai_identifier":"oai:vtechworks.lib.vt.edu:10919/71327"},"canonical_url":"https://search.dev.ndltd.org/etd/vt/oai:vtechworks.lib.vt.edu:10919/71327","repository":{"repo_id":"vt","name":"Virginia Tech","base_url":"https://vtechworks.lib.vt.edu/oai/request"},"display":{"title":"Experimental Measurements of Heat Transfer from a Cylinder to Turbulent Isothermal and Non-Isothermal Jets","abstract":"This work is an experimental study of the effect of impinging distance on the heat transfer from a cylinder to turbulent isothermal and non-isothermal jets. The isothermal jet is discharged horizontally at the same temperature as the ambient air while the non-isothermal jet is discharged vertically upwards and vertically downwards at a temperature colder than the ambient air. Temperature measurements are made on a heated cylinder using an infrared (IR) camera at five equal impinging distances ranging from Z/d =4 to Z/d=20 and the distributions of the local Frossling numbers are determined. The overall decrease in the average Frossling numbers of the cylinder impinged by the isothermal jet and the cold jets was 25 % and 40% respectively. The peak values of average Frossling number for the isothermal and the cold jets occurred at Z/d=8 and Z/d=4 respectively. The Stagnation Frossling number and the normalized jet centerline velocity for the isothermal and the cold jets were found to be very close to each other at all impinging distances indicating that the effect of buoyancy is negligible in the range of jet temperatures and distances used in the experiment.","abstract_html":"This work is an experimental study of the effect of impinging distance on the heat transfer from a cylinder to turbulent isothermal and non-isothermal jets. The isothermal jet is discharged horizontally at the same temperature as the ambient air while the non-isothermal jet is discharged vertically upwards and vertically downwards at a temperature colder than the ambient air. Temperature measurements are made on a heated cylinder using an infrared (IR) camera at five equal impinging distances ranging from Z/d =4 to Z/d=20 and the distributions of the local Frossling numbers are determined. The overall decrease in the average Frossling numbers of the cylinder impinged by the isothermal jet and the cold jets was 25 % and 40% respectively. The peak values of average Frossling number for the isothermal and the cold jets occurred at Z/d=8 and Z/d=4 respectively. The Stagnation Frossling number and the normalized jet centerline velocity for the isothermal and the cold jets were found to be very close to each other at all impinging distances indicating that the effect of buoyancy is negligible in the range of jet temperatures and distances used in the experiment.","abstract_has_math":false,"creators":["Balasubramanian, Karthik"],"institution":"Virginia Tech","degree_name":"Master of Science","degree_level":"masters","degree_discipline":"Mechanical Engineering","degree_department":"Mechanical Engineering","school":null,"contributors":[],"advisors":[],"committee_chairs":["Diller, Thomas E."],"committee_members":["Qiao, Rui","Huxtable, Scott T."],"year":2016,"date_issued":"2016-06-08","date_published":"2016-06-08","updated_at":"2026-07-22T22:18:58Z","subjects":["Isothermal jets","Frossling number","Froude number","Heat transfer"],"languages":[],"rights":["In Copyright"],"rights_urls":["http://rightsstatements.org/vocab/InC/1.0/"],"identifier_entries":[{"key":"dc:identifier.other","label":"Dc Identifier Other","values":["vt_gsexam:8186"],"render_values":[{"text":"vt_gsexam:8186","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/10919/71327","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.committeechair","label":"Committee Chair","values":["Diller, Thomas E."]},{"key":"dc:contributor.committeemember","label":"Committee Member","values":["Qiao, Rui","Huxtable, Scott T."]},{"key":"dc:contributor.department","label":"Department","values":["Mechanical Engineering"]},{"key":"dc:creator","label":"Author","values":["Balasubramanian, Karthik"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2016-06-09T08:00:18Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2016-06-09T08:00:18Z"]},{"key":"dc:date.issued","label":"Date","values":["2016-06-08"]},{"key":"dc:publisher","label":"Institution","values":["Virginia Tech"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Mechanical Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["masters"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["Virginia Polytechnic Institute and State University"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Isothermal jets","Frossling number","Froude number","Heat transfer"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:rights","label":"Dc Rights","values":["In Copyright"]},{"key":"dc:rights.uri","label":"Rights URI","values":["http://rightsstatements.org/vocab/InC/1.0/"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.other","label":"Dc Identifier Other","values":["vt_gsexam:8186"]},{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/10919/71327"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["This work is an experimental study of the effect of impinging distance on the heat transfer from a cylinder to turbulent isothermal and non-isothermal jets. The isothermal jet is discharged horizontally at the same temperature as the ambient air while the non-isothermal jet is discharged vertically upwards and vertically downwards at a temperature colder than the ambient air. Temperature measurements are made on a heated cylinder using an infrared (IR) camera at five equal impinging distances ranging from Z/d =4 to Z/d=20 and the distributions of the local Frossling numbers are determined. The overall decrease in the average Frossling numbers of the cylinder impinged by the isothermal jet and the cold jets was 25 % and 40% respectively. The peak values of average Frossling number for the isothermal and the cold jets occurred at Z/d=8 and Z/d=4 respectively. The Stagnation Frossling number and the normalized jet centerline velocity for the isothermal and the cold jets were found to be very close to each other at all impinging distances indicating that the effect of buoyancy is negligible in the range of jet temperatures and distances used in the experiment."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["Master of Science"]},{"key":"dc:format.medium","label":"Dc Format Medium","values":["ETD"]},{"key":"dc:title","label":"Title","values":["Experimental Measurements of Heat Transfer from a Cylinder to Turbulent Isothermal and Non-Isothermal Jets"]}]}],"canonical_facts":{"dc:contributor.committeechair":["Diller, Thomas E."],"dc:contributor.committeemember":["Qiao, Rui","Huxtable, Scott T."],"dc:contributor.department":["Mechanical Engineering"],"dc:creator":["Balasubramanian, Karthik"],"dc:date.accessioned":["2016-06-09T08:00:18Z"],"dc:date.available":["2016-06-09T08:00:18Z"],"dc:date.issued":["2016-06-08"],"dc:description.abstract":["This work is an experimental study of the effect of impinging distance on the heat transfer from a cylinder to turbulent isothermal and non-isothermal jets. The isothermal jet is discharged horizontally at the same temperature as the ambient air while the non-isothermal jet is discharged vertically upwards and vertically downwards at a temperature colder than the ambient air. Temperature measurements are made on a heated cylinder using an infrared (IR) camera at five equal impinging distances ranging from Z/d =4 to Z/d=20 and the distributions of the local Frossling numbers are determined. The overall decrease in the average Frossling numbers of the cylinder impinged by the isothermal jet and the cold jets was 25 % and 40% respectively. The peak values of average Frossling number for the isothermal and the cold jets occurred at Z/d=8 and Z/d=4 respectively. The Stagnation Frossling number and the normalized jet centerline velocity for the isothermal and the cold jets were found to be very close to each other at all impinging distances indicating that the effect of buoyancy is negligible in the range of jet temperatures and distances used in the experiment."],"dc:description.degree":["Master of Science"],"dc:format.medium":["ETD"],"dc:identifier.other":["vt_gsexam:8186"],"dc:identifier.uri":["http://hdl.handle.net/10919/71327"],"dc:publisher":["Virginia Tech"],"dc:rights":["In Copyright"],"dc:rights.uri":["http://rightsstatements.org/vocab/InC/1.0/"],"dc:subject":["Isothermal jets","Frossling number","Froude number","Heat transfer"],"dc:title":["Experimental Measurements of Heat Transfer from a Cylinder to Turbulent Isothermal and Non-Isothermal Jets"],"dc:type":["Thesis"],"thesis:degree_discipline":["Mechanical Engineering"],"thesis:degree_level":["masters"],"thesis:degree_name":["Master of Science"],"thesis:institution_name":["Virginia Polytechnic Institute and State University"]},"updated_at":"2026-07-22T22:18:58Z"}