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3-D modeling of particle laden density current

Hormozi, S ; Sharif University of Technology | 2006

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  1. Type of Document: Article
  2. DOI: 10.1115/IMECE2006-14640
  3. Publisher: American Society of Mechanical Engineers (ASME) , 2006
  4. Abstract:
  5. The gravity currents on the inclined boundaries are formed when the inflow fluid has a density difference with the ambient fluid and a tangential component of gravity becomes the driving force. If the density difference arises from the suspension of particles, the currents are known as particle-driven density currents, in which the local density of the gravity current depends on the concentration of particles. A low Reynolds k-ε turbulence model is used to simulate three dimensional turbidity currents. Also a laboratory apparatus was built to study the 3D flow resulting from the release of particle laden density currents on a sloping surface in a channel of freshwater via a sluice gate and Kaolin was used as the suspended material. The height, width, velocity and concentration profiles are calculated and compared with the laboratory experiments which show good agreement. Averaged parameters were obtained and Entrainment coefficients against Richardson number were acquired without any approximation and simplification which show the same trend as previous 2D experimental data. Copyright © 2006 by ASME
  6. Keywords:
  7. Approximation theory ; Computational fluid dynamics ; Computer simulation ; Parameter estimation ; Reynolds equation ; Turbulence models ; Velocity measurement ; Driving forces ; Gravity currents ; Flow of fluids
  8. Source: 2006 ASME International Mechanical Engineering Congress and Exposition, IMECE2006, Chicago, IL, 5 November 2006 through 10 November 2006 ; 2006 ; 08888116 (ISSN); 0791837904 (ISBN); 9780791837900 (ISBN)
  9. URL: https://asmedigitalcollection.asme.org/IMECE/proceedings-abstract/IMECE2006/47705/669/310140