2026-04-14T02:39:46Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/4100072026-01-18T06:45:27Zcom_2072_1033col_2072_452950

Unstructured Conservative Level-Set (UCLS) method for reactive mass transfer in bubble swarmsat high density ratio Balcázar Arciniega, Néstor Rigola Serrano, Joaquim Oliva Llena, Asensio Universitat Politècnica de Catalunya. Departament de Màquines i Motors Tèrmics Universitat Politècnica de Catalunya. CTTC - Centre Tecnològic de Transferència de Calor Àrees temàtiques de la UPC::Física::Termodinàmica Level set methods Two-phase flow Bubbles Mass transfer Unstructured conservative level-set method Unstructured flux-limiters Two-phase flow Mass transfer Bubble swarms High density ratio Unstructured meshes Finite-volume method Corbes de nivell, Mètodes de Flux bifàsic Bombolles Transferència de massa This research presents a parallel Unstructured Conservative Level-Set (UCLS)method for reactive mass transfer in bubbles with a high-density ratio. This method uses the multiple-marker UCLS approach to circumvent the numerical coalescence of bubbles, combined with the finite-volume method to discretize transport equations on 3D collocated unstructured meshes. The fractional-step projection method solves the pressure-velocity coupling. The central difference scheme discretizes the diffusive term, whereas convective term within the momentum transport equation, level-set advection equations, and mass transfer equation are discretized by unstructured flux-limiters schemes. Such a combination of numerical techniques preserves the numerical stability in bubbly flows with a high Reynolds number and high-density ratio. Numerical and physical findings on the effect of physical properties ratios on the reactive mass transfer are reported, including their effect on the Reynolds number, interfacial area and Sherwood number. The principal author, N. Balcázar-Arciniega, as Serra-Hunter Lecturer (UPC-LE8027), acknowledges the financial support provided by the Catalan Government through this program. The authors thankfully acknowledge RES resources provided by BSC in MareNostrum IV to IM-2023-2-0009, IM-2023-1-0003. The financial support of the MINECO, Spain (grant PID2020115837RB-100), is acknowledged. Postprint (published version) 2024 Conference report Balcázar-Arciniega, N.; Rigola, J.; Oliva, A. Unstructured Conservative Level-Set (UCLS) method for reactive mass transfer in bubble swarmsat high density ratio. A: European Thermal Sciences Conference. "Journal of physics: conference series, volume 2766: 9th European Thermal Sciences Conference". Londres: Institute of Physics (IOP), 2024, p. 1-6. ISBN 1742-6596. DOI 10.1088/1742-6596/2766/1/012062. 1742-6596 https://hdl.handle.net/2117/410007 10.1088/1742-6596/2766/1/012062 eng https://iopscience.iop.org/article/10.1088/1742-6596/2766/1/012062/meta info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-115837RB-I00/ES/DNS Y MODELIZACION MULTI-ESCALA DE FENOMENOS DE TRANSPORTE INTERFACIAL EN FLUJOS DE BURBUJAS Y PELICULAS DESCENDIENTES. APLICACION A SISTEMAS Y EQUIPOS TERMICOS/ http://creativecommons.org/licenses/by/4.0/ Open Access Attribution 4.0 International 6 p. application/pdf Institute of Physics (IOP)