{"id":{"repo_id":"aston","oai_identifier":"oai:publications.aston.ac.uk:10124"},"canonical_url":"https://search.dev.ndltd.org/etd/aston/oai:publications.aston.ac.uk:10124","repository":{"repo_id":"aston","name":"Aston University","base_url":"https://publications.aston.ac.uk/cgi/oai2"},"display":{"title":"Mixing of Liquids in Large Tanks","abstract":"A 1.2 m diameter tank has been used to model the mixing process in large storage tanks equipped with side-entry mixers.Terminal mixing times have been measured as a function of impeller speed, impeller diameter, liquid depth and impeller angle. it is shown that the indicator method for measuring mixing times yields results which are dependent upon the molecular diffusivity of the materials employed. A mathematical model is presented which accounts for this effect, and some of it's predictions have been tested using a 70 mm diameter tank. It is shown that the conductivity method for measuring mixing times gives results which can be used for scale-up using the rule NϒD2 /Τ2 = Const., and this has been tested on a 31 m diameter tank. Measurements have also been made of fluid velocities using a hot film anemometer, and these are shown to be consistent with a simple boundary layer theory.","abstract_html":"A 1.2 m diameter tank has been used to model the mixing process in large storage tanks equipped with side-entry mixers.Terminal mixing times have been measured as a function of impeller speed, impeller diameter, liquid depth and impeller angle. it is shown that the indicator method for measuring mixing times yields results which are dependent upon the molecular diffusivity of the materials employed. A mathematical model is presented which accounts for this effect, and some of it's predictions have been tested using a 70 mm diameter tank. It is shown that the conductivity method for measuring mixing times gives results which can be used for scale-up using the rule NϒD2 /Τ2 = Const., and this has been tested on a 31 m diameter tank. Measurements have also been made of fluid velocities using a hot film anemometer, and these are shown to be consistent with a simple boundary layer theory.","abstract_has_math":false,"creators":["Doyle, Keith G."],"institution":"Aston University","degree_name":"Ph.D.","degree_level":"doctoral","degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1974,"date_issued":"1974-01","date_published":"1974-01","updated_at":"2026-07-24T01:01:09Z","subjects":[],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":null,"outbound_label":null,"outbound_source":null},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Doyle, Keith G."]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["1974-01"]},{"key":"dc:date.issued","label":"Date","values":["1974-01"]},{"key":"dc:publisher.department","label":"Dc Publisher Department","values":["Chemical Engineering & Applied Chemistry"]},{"key":"dc:publisher.institution","label":"Dc Publisher Institution","values":["Aston University"]},{"key":"dc:relation.isreferencedby","label":"Dc Relation Isreferencedby","values":["https://publications.aston.ac.uk/id/eprint/10124/"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"dc:type.qualificationlevel","label":"Dc Type Qualificationlevel","values":["doctoral"]},{"key":"dc:type.qualificationname","label":"Dc Type Qualificationname","values":["Ph.D."]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://publications.aston.ac.uk/id/eprint/10124/1/173242_KG_Doyle_1974.pdf"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["A 1.2 m diameter tank has been used to model the mixing process in large storage tanks equipped with side-entry mixers.Terminal mixing times have been measured as a function of impeller speed, impeller diameter, liquid depth and impeller angle. it is shown that the indicator method for measuring mixing times yields results which are dependent upon the molecular diffusivity of the materials employed. A mathematical model is presented which accounts for this effect, and some of it's predictions have been tested using a 70 mm diameter tank. It is shown that the conductivity method for measuring mixing times gives results which can be used for scale-up using the rule NϒD2 /Τ2 = Const., and this has been tested on a 31 m diameter tank. Measurements have also been made of fluid velocities using a hot film anemometer, and these are shown to be consistent with a simple boundary layer theory."]},{"key":"dc:format","label":"Dc Format","values":["text"]},{"key":"dc:title","label":"Title","values":["Mixing of Liquids in Large Tanks"]}]}],"canonical_facts":{"dc:creator":["Doyle, Keith G."],"dc:date":["1974-01"],"dc:date.issued":["1974-01"],"dc:description.abstract":["A 1.2 m diameter tank has been used to model the mixing process in large storage tanks equipped with side-entry mixers.Terminal mixing times have been measured as a function of impeller speed, impeller diameter, liquid depth and impeller angle. it is shown that the indicator method for measuring mixing times yields results which are dependent upon the molecular diffusivity of the materials employed. A mathematical model is presented which accounts for this effect, and some of it's predictions have been tested using a 70 mm diameter tank. It is shown that the conductivity method for measuring mixing times gives results which can be used for scale-up using the rule NϒD2 /Τ2 = Const., and this has been tested on a 31 m diameter tank. Measurements have also been made of fluid velocities using a hot film anemometer, and these are shown to be consistent with a simple boundary layer theory."],"dc:format":["text"],"dc:identifier.uri":["https://publications.aston.ac.uk/id/eprint/10124/1/173242_KG_Doyle_1974.pdf"],"dc:publisher.department":["Chemical Engineering & Applied Chemistry"],"dc:publisher.institution":["Aston University"],"dc:relation.isreferencedby":["https://publications.aston.ac.uk/id/eprint/10124/"],"dc:title":["Mixing of Liquids in Large Tanks"],"dc:type":["Thesis"],"dc:type.qualificationlevel":["doctoral"],"dc:type.qualificationname":["Ph.D."]},"updated_at":"2026-07-24T01:01:09Z"}