Riunet Móvil

Home Versión de escritorio

Role of heat transfer in bubble dynamics neglecting phase change. A numerical study

Mostrar el registro sencillo del ítem

dc.contributor.author Fostiropoulos, Stavros Rafail es_ES
dc.contributor.author Malgarinos, Ilias es_ES
dc.contributor.author Strotos, George es_ES
dc.contributor.author Nikolopoulos, Nikolaos es_ES
dc.contributor.author Kakaras, Emmanouil es_ES
dc.contributor.author Koukouvinis, Phoevos es_ES
dc.contributor.author Gavaises, Manolis es_ES
dc.date.accessioned 2018-03-28T09:43:46Z
dc.date.available 2018-03-28T09:43:46Z
dc.date.issued 2017-07-28
dc.identifier.isbn 9788490485804
dc.identifier.uri http://hdl.handle.net/10251/99843
dc.description.abstract [EN] Bubble dynamics is generally described by the well-known Rayleigh-Plesset (R-P) equation in which the bubble pressure (or equivalently the bubble density) is predefined by assuming a polytropic gas equation of state with common assumptions to include either isothermal or adiabatic bubble behaviour. The present study examines the applicability of this assumption by assuming that the bubble density obeys the ideal gas equation of state, while the heat exchange with the surrounding liquid is estimated as part of the numerical solution. The numerical model employed includes the solution of the Navier-Stokes equations along with the energy equation, while the liquidgas interface is tracked using the Volume of Fluid (VOF) methodology; phase-change mechanism is assumed to be insignificant compared to bubble heat transfer mechanism. To assess the effect of heat transfer and gas equation of state on bubble behaviour, simulations are also performed for the same initial conditions by using a polytropic equation of state for the bubble phase without solving the energy equation. The accuracy of computations is enhanced by using a dynamic local grid refinement technique which reduces the computational cost and allows for the accurate representation of the interface for the whole duration of the phenomenon in which the bubble size changes significantly. A parametric study performed for various initial bubble sizes and ambient conditions reveals the cases for which the bubble behaviour resembles that of an isothermal or the adiabatic one. Additional to the CFD simulations, a 0-D model is proposed to predict the bubble dynamics. This combines the solution of a modified R-P equation assuming ideal gas bubble content along with an equation for the bubble temperature based on the 1st law of thermodynamics; a correction factor is used to represent accurately the heat transfer between the two phases. es_ES
dc.description.sponsorship Financial support from the MSCA-ITN-ETN of the European Union’s H2020 programme, under REA grant agreement n. 675676 is acknowledged. es_ES
dc.format.extent 8 es_ES
dc.language Inglés es_ES
dc.publisher Editorial Universitat Politècnica de València es_ES
dc.relation.ispartof Ilass Europe. 28th european conference on Liquid Atomization and Spray Systems es_ES
dc.rights Reconocimiento - No comercial - Sin obra derivada (by-nc-nd) es_ES
dc.subject Bubble dynamics es_ES
dc.subject Heat transfer es_ES
dc.subject CFD-VOF mode es_ES
dc.subject 0-D model es_ES
dc.title Role of heat transfer in bubble dynamics neglecting phase change. A numerical study es_ES
dc.title.alternative Numerical investigation of the role of heat transfer in bubble dynamics es_ES
dc.type Capítulo de libro es_ES
dc.type Comunicación en congreso es_ES
dc.identifier.doi 10.4995/ILASS2017.2017.4691
dc.relation.projectID info:eu-repo/grantAgreement/EC/H2020/675676/EU/Holistic Approach of Spray Injection through a Generalized Multi-phase Framework/ es_ES
dc.rights.accessRights Abierto es_ES
dc.description.bibliographicCitation Fostiropoulos, SR.; Malgarinos, I.; Strotos, G.; Nikolopoulos, N.; Kakaras, E.; Koukouvinis, P.; Gavaises, M. (2017). Role of heat transfer in bubble dynamics neglecting phase change. A numerical study. En Ilass Europe. 28th european conference on Liquid Atomization and Spray Systems. Editorial Universitat Politècnica de València. 904-911. https://doi.org/10.4995/ILASS2017.2017.4691 es_ES
dc.description.accrualMethod OCS es_ES
dc.relation.conferencename ILASS2017 - 28th European Conference on Liquid Atomization and Spray Systems es_ES
dc.relation.conferencedate September 06-08,2017 es_ES
dc.relation.conferenceplace Valencia, Spain es_ES
dc.relation.publisherversion http://ocs.editorial.upv.es/index.php/ILASS/ILASS2017/paper/view/4691 es_ES
dc.description.upvformatpinicio 904 es_ES
dc.description.upvformatpfin 911 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.relation.pasarela OCS\4691 es_ES


Ficheros en el ítem

Este ítem aparece en la(s) siguiente(s) colección(ones)

Mostrar el registro sencillo del ítem

 

Tema móvil para Riunet