{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/83993"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/83993","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Effect of Anisotropic Solid-Phase Thermal Conductivity on Vertical Bridgman Growth","abstract":"The results for Bridgman growth of thermally anisotropic materials are illustrated for benzene, for which the thermal conductivity has been measured parallel and perpendicular to the growth direction of directionally solidified specimens. We study the effects of anisotropy by performing computations using measured components of the thermal conductivity tensor, and by considering macroscopically isotropic (e.g., polycrystalline) solid benzene, as well as fictitious materials whose properties differ from those of benzene only in that they have a larger solidphase conductivity in the direction of growth. Besides concave and convex interface shapes, commonly associated with vertical Bridgman growth, we also find, for a range of solidification conditions, interface shapes that are neither concave nor convex. We find that increasing the conductivity parallel to the growth direction has the effect of planarizing the interface over a large central core, and increasing the curvature near the wall. Differences between our computation and those not accounting for flow are discussed.","abstract_html":"The results for Bridgman growth of thermally anisotropic materials are illustrated for benzene, for which the thermal conductivity has been measured parallel and perpendicular to the growth direction of directionally solidified specimens. We study the effects of anisotropy by performing computations using measured components of the thermal conductivity tensor, and by considering macroscopically isotropic (e.g., polycrystalline) solid benzene, as well as fictitious materials whose properties differ from those of benzene only in that they have a larger solidphase conductivity in the direction of growth. Besides concave and convex interface shapes, commonly associated with vertical Bridgman growth, we also find, for a range of solidification conditions, interface shapes that are neither concave nor convex. We find that increasing the conductivity parallel to the growth direction has the effect of planarizing the interface over a large central core, and increasing the curvature near the wall. Differences between our computation and those not accounting for flow are discussed.","abstract_has_math":false,"creators":["Lee, Hanjie"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Mechanical Engineering","degree_department":null,"school":null,"contributors":["Pearlstein, Arne J."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2015,"date_issued":"2015-09-25T21:13:03Z","date_published":"2015-09-25T21:13:03Z","updated_at":"2026-07-22T22:26:22Z","subjects":["Engineering, Chemical"],"languages":["eng"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["(MiAaPQ)AAI9953072"],"render_values":[{"text":"(MiAaPQ)AAI9953072","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/83993","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Pearlstein, Arne J."]},{"key":"dc:creator","label":"Author","values":["Lee, Hanjie"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2015-09-25T21:13:03Z","10000-01-01","1999"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Mechanical Engineering"]},{"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":["Engineering, Chemical"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/83993","(MiAaPQ)AAI9953072"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["The results for Bridgman growth of thermally anisotropic materials are illustrated for benzene, for which the thermal conductivity has been measured parallel and perpendicular to the growth direction of directionally solidified specimens. We study the effects of anisotropy by performing computations using measured components of the thermal conductivity tensor, and by considering macroscopically isotropic (e.g., polycrystalline) solid benzene, as well as fictitious materials whose properties differ from those of benzene only in that they have a larger solidphase conductivity in the direction of growth. Besides concave and convex interface shapes, commonly associated with vertical Bridgman growth, we also find, for a range of solidification conditions, interface shapes that are neither concave nor convex. We find that increasing the conductivity parallel to the growth direction has the effect of planarizing the interface over a large central core, and increasing the curvature near the wall. Differences between our computation and those not accounting for flow are discussed.","Made available in DSpace on 2015-09-25T21:13:03Z (GMT). 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We study the effects of anisotropy by performing computations using measured components of the thermal conductivity tensor, and by considering macroscopically isotropic (e.g., polycrystalline) solid benzene, as well as fictitious materials whose properties differ from those of benzene only in that they have a larger solidphase conductivity in the direction of growth. Besides concave and convex interface shapes, commonly associated with vertical Bridgman growth, we also find, for a range of solidification conditions, interface shapes that are neither concave nor convex. We find that increasing the conductivity parallel to the growth direction has the effect of planarizing the interface over a large central core, and increasing the curvature near the wall. Differences between our computation and those not accounting for flow are discussed.","Made available in DSpace on 2015-09-25T21:13:03Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 9953072.pdf: 5397833 bytes, checksum: 383fe2cdd59a992767924e6b3b80c527 (MD5) Previous issue date: 1999","Embargo set by: Seth Robbins for item 85274 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","133 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1999."],"dc:identifier":["http://hdl.handle.net/2142/83993","(MiAaPQ)AAI9953072"],"dc:language":["eng"],"dc:subject":["Engineering, Chemical"],"dc:title":["Effect of Anisotropic Solid-Phase Thermal Conductivity on Vertical Bridgman Growth"],"dc:type":["text"],"thesis:degree_discipline":["Mechanical Engineering"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:26:22Z"}