Transcription of Lecture 14 - Multiphase Flows Applied …
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Lecture 14 - Multiphase Flows Applied …
1 Lecture 14 - Multiphase FlowsApplied computational fluid DynamicsInstructor: Andr Andr Bakker (2002-2006) Fluent Inc. (2002)2 Definitions Multiphase flow is simultaneous flow of: Materials with different states or phases ( gas, liquid or solid). Materials with different chemical properties but in the same state or phase ( liquid-liquid systems such as oil droplets in water). The primary and secondary phases: One of the phases is continuous (primary) while theother(s) (secondary) are dispersed within the continuous phase. A diameter has to be assigned for each secondary phase to calculate its interaction (drag) with the primary phase. A secondary phase with a particle size distribution is modeled by assigning a separate phase for each particle Dilute versus dense phase: Refers to the volume fraction of secondary phase(s). Volume fraction of a phase = Laminar versus turbulent: Each phase can be laminar or turbulent. fluid flow (primary phase) may be turbulent with respect to the secondary phase but may be laminar with respect to the of the phase in a cell/domainVolume of the cell/domainDefinitions (2)4 Why model Multiphase flow?
1 Lecture 14 - Multiphase Flows Applied Computational Fluid Dynamics Instructor: André Bakker http://www.bakker.org © André Bakker (2002-2006) © Fluent Inc. (2002)
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