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SUMMARY:Development and application of computational multi-fluid dynamics
DTSTART;VALUE=DATE-TIME:20110309T170000Z
DTEND;VALUE=DATE-TIME:20110309T180000Z
DTSTAMP;VALUE=DATE-TIME:20261010T111954Z
UID:indico-event-119@indico.ipb.ac.rs
DESCRIPTION:Abstract: Computational Multi-Fluid Dynamics (CMFD) for multid
 imensional gas-liquid flows is an emerging field. Due to the complexity an
 d diversity of two-phase gas-liquid flow conditions\, further development 
 of two- phase flow modeling\, closure laws and numerical methods is needed
  in order to achieve the general purpose and efficient CMFD methods\, whic
 h will be applicable to a wide variety of technical and technological cond
 itions.An original approach to the various aspects of CMFD modeling is pre
 sented. It is based on the multi-fluid modeling approach\, development of 
 necessary closure laws and derivation of appropriate numerical methods for
  efficient governing equations solution. Mass\, momentum and energy conser
 vation equations are written for several fluid streams\, depending on the 
 investigated flow conditions. Great differences of phase densities and oth
 er thermo-physical properties in two-phase flows impose strict requirement
 s to the stability and accuracy of applied numerical method of solution. T
 he numerical method should be applicable to interpenetrating multiphase fl
 ows\, as well as to separated structures with interface movement. Velocity
  and pressure fields are solved with the SIMPLE type pressure-corrector me
 thod developed for the multiphase flow conditions. For the solution of sca
 lar parameters transport equations both implicit and explicit methods are 
 presented. The implicit method is suitable for steady state\, slow transie
 nts and problems without the sharp front propagation. The explicit method\
 , based on the fluid particle tracking\, is a third order accurate numeric
 al scheme. It is developed in order to predict scalar parameters front pro
 pagations\, as well as phase interface tracking problems.The developed met
 hod possibilities are demonstrated by solving standard benchmark tests\, a
 s well as real engineering problems. The solving of the benchmark problems
  includes the transient boiling boundary prediction\, interface tracking p
 roblems such as the broken dam problem and the initially homogeneous two-p
 hase mixture separation in the vessel\, the dispersed gas phase-droplets a
 nd liquid film flows around spacers\, and the burn-out in pool boiling. So
 lved macro domain engineering problems are steady-state and transient two-
 phase flows in steam generators and kettle reboilers\, headers of heat exc
 hangers for refrigerant evaporation and the steam condensation in non-vent
 ed pipes in the presence of non-condensables. Obtained numerical results a
 re compared and verified with experimental data or available analytical so
 lutions. The presented numerical results show that the developed CMFD meth
 od for multiphase flow is a useful and robust tool for the simulation and 
 analyses of fluid flow in equipment of different geometry and in different
  thermal-hydraulic processes. Obtained results are a support to equipment 
 design\, plant operational diagnostics and safety analyses in energy\, che
 mical and process industry.\n\nhttps://events.saifa.rs/event/119/
LOCATION:Mathematical Institute 301 F
URL:https://events.saifa.rs/event/119/
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