Experimental and computational investigations of nearly dense two-phase sudden expansion flows

Founti, M; Klipfel, A

dc.contributor.author	Founti, M	en
dc.contributor.author	Klipfel, A	en
dc.date.accessioned	2014-03-01T01:13:44Z
dc.date.available	2014-03-01T01:13:44Z
dc.date.issued	1998	en
dc.identifier.issn	0894-1777	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/12698
dc.subject	two-phase flows	en
dc.subject	particle motion-collisions	en
dc.subject	experiments	en
dc.subject	computational fluid dynamics	en
dc.subject	model development	en
dc.subject.classification	Thermodynamics	en
dc.subject.classification	Engineering, Mechanical	en
dc.subject.classification	Physics, Fluids & Plasmas	en
dc.subject.other	Computational fluid dynamics	en
dc.subject.other	Dispersions	en
dc.subject.other	Kinetic energy	en
dc.subject.other	Particles (particulate matter)	en
dc.subject.other	Turbulence	en
dc.subject.other	Particle motion collisions	en
dc.subject.other	Turbulent kinetic energy	en
dc.subject.other	Two phase flow	en
dc.subject.other	computational fluid dynamics	en
dc.subject.other	sudden expansion	en
dc.subject.other	two-phase flow	en
dc.subject.other	multiphase flow	en
dc.subject.other	sudden expansion	en
dc.title	Experimental and computational investigations of nearly dense two-phase sudden expansion flows	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0894-1777(97)10046-2	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0894-1777(97)10046-2	en
heal.language	English	en
heal.publicationDate	1998	en
heal.abstract	The work investigates experimentally and computationally the effects of particle-to-particle collisions on the characteristics of the particle motion in a vertical downward flowing sudden expansion flow. The investigated flow is nearly dense, Iaden with spherical glass particles at 5% per volume. In order to simulate the particle-to-particle collision phenomena a model has been developed based upon the simultaneous Lagrangian tracking of all the particles which move inside the flow domain. Computational results with and without the particle-to-particle collision model are presented and compared to experimental data. The results establish flow regimes where particle-to-particle collisions become significant in that they modify the turbulent kinetic energy of the particles. It is shown that particle-to-particle collisions induce small variation of the fluid-particle slip velocities and reduce the vurbulent kinetic energy of the dispersed phase mainly in the shear layer zone where the turbulent kinetic energy of the carrier phase attains maximum values.The work investigates experimentally and computationally the effects of particle-to-particle collisions on the characteristics of the particle motion in a vertical downward flowing sudden expansion flow. The investigated flow is nearly dense, laden with spherical glass particles at 5% per volume. In order to simulate the particle-to-particle collision phenomena a model has been developed based upon the simultaneous Lagrangian tracking of all the particles which move inside the flow domain. Computational results with and without the particle-to-particle collision model are presented and compared to experimental data. The results establish flow regimes where particle-to-particle collisions become significant in that they modify the turbulent kinetic energy of the particles. It is shown that particle-to-particle collisions induce small variation of the fluid-particle slip velocities and reduce the turbulent kinetic energy of the dispersed phase mainly in the shear layer zone where the turbulent kinetic energy of the carrier phase attains maximum values.	en
heal.publisher	Elsevier Science Inc, New York, NY, United States	en
heal.journalName	Experimental Thermal and Fluid Science	en
dc.identifier.doi	10.1016/S0894-1777(97)10046-2	en
dc.identifier.isi	ISI:000074391700004	en
dc.identifier.volume	17	en
dc.identifier.issue	1-2	en
dc.identifier.spage	27	en
dc.identifier.epage	36	en