{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/11616"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/11616","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Hydrodynamic Simulations of Colloidal Gels: Microstructure, Dynamics, and Rheology","abstract":"The microstructure, dynamics, and rheology of colloidal suspensions with short-range depletion attraction and long-range electrostatic repulsion are studied using equilibrium predictions and a new algorithm for dynamic simulations. A focus is made on those combinations of attraction and repulsion that lead to the formation of gels. The effects of varying the strength of attraction (0–50kT), range of attraction (0.05–0.18a), strength of repulsion (0–54kT), and volume fraction (0.1–0.4) are investigated, where k is Boltzmann’s constant, T is the temperature, and a is the colloid radius. Hard-sphere thermodynamic perturbation theory is employed to predict equilibrium behavior. A new algorithm called Fast Lubrication Dynamics (FLD) is developed as part of this work and enables dynamic simulations including the effects of many-body hydrodynamic interactions, Brownian motion, and interparticle interactions at a speed more than 100 times faster than Stokesian Dynamics (SD) while retaining much of the relevant physics of SD. In addition, FLD is found to be nearly as fast as Brownian Dynamics (BD) due to the larger time steps allowed by FLD. The results of FLD simulations are compared with those of BD simulations as well as experimental results.","abstract_html":"The microstructure, dynamics, and rheology of colloidal suspensions with short-range depletion attraction and long-range electrostatic repulsion are studied using equilibrium predictions and a new algorithm for dynamic simulations. A focus is made on those combinations of attraction and repulsion that lead to the formation of gels. The effects of varying the strength of attraction (0–50kT), range of attraction (0.05–0.18a), strength of repulsion (0–54kT), and volume fraction (0.1–0.4) are investigated, where k is Boltzmann’s constant, T is the temperature, and a is the colloid radius. Hard-sphere thermodynamic perturbation theory is employed to predict equilibrium behavior. A new algorithm called Fast Lubrication Dynamics (FLD) is developed as part of this work and enables dynamic simulations including the effects of many-body hydrodynamic interactions, Brownian motion, and interparticle interactions at a speed more than 100 times faster than Stokesian Dynamics (SD) while retaining much of the relevant physics of SD. In addition, FLD is found to be nearly as fast as Brownian Dynamics (BD) due to the larger time steps allowed by FLD. The results of FLD simulations are compared with those of BD simulations as well as experimental results.","abstract_has_math":false,"creators":["Bybee, Michael Dean"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Chemical and Biomolecular Engineering","degree_department":null,"school":null,"contributors":["Higdon, Jonathan J.L.","Schweizer, Kenneth S.","Kong, Hyun Joon","Schroeder, Charles M."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2009,"date_issued":"2009-04-27T20:27:34Z","date_published":"2009-04-27T20:27:34Z","updated_at":"2026-07-22T22:24:48Z","subjects":["colloidal suspension","colloidal gel","numerical simulation","hydrodynamic interaction"],"languages":["en"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Chemical and Biomolecular Engineering in the Graduate College of the University of Illinois at Urbana-Champaign, 2009"],"render_values":[{"text":"Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Chemical and Biomolecular Engineering in the Graduate College of the University of Illinois at Urbana-Champaign, 2009","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/11616","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Higdon, Jonathan J.L.","Schweizer, Kenneth S.","Kong, Hyun Joon","Schroeder, Charles M."]},{"key":"dc:creator","label":"Author","values":["Bybee, Michael Dean"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2009-04-27T20:27:34Z","2009-04"]},{"key":"dc:type","label":"Dc Type","values":["Dissertation / Thesis","text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Chemical and Biomolecular 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":["colloidal suspension","colloidal gel","numerical simulation","hydrodynamic interaction"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Chemical and Biomolecular Engineering in the Graduate College of the University of Illinois at Urbana-Champaign, 2009","http://hdl.handle.net/2142/11616"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["The microstructure, dynamics, and rheology of colloidal suspensions with short-range depletion attraction and long-range electrostatic repulsion are studied using equilibrium predictions and a new algorithm for dynamic simulations. 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