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Theoretical and experimental investigation of density jump on an inclined surface

Najafpour, N ; Sharif University of Technology

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  1. Type of Document: Article
  2. Abstract:
  3. The density jump on an inclined surface is analyzed using an integral method by applying mass and momentum conservation equations. The jump occurs in a two-layered fluid flow in which the upper layer is stagnant and very deep. A relation is derived, which gives the conjugate depth ratio as a function of inlet densimetric Froude number, inlet concentration ratio, bed slope and entrainment. A set of experiments are performed to verify the relation. The theory and the measurements are in good agreement. The analysis reveals that increasing the surface inclination results in a decrease in the conjugate depth ratio. This analysis also shows that the densimetric Froude number just after the jump is a function of the inlet densimetric Froude number and surface inclination and not inlet concentration. The model predicts a critical Froude number of 1.12 for horizontal internal hydraulic jumps in salt-water density flows. It also reveals that the critical Froude number for internal hydraulic jumps in salt-water density flows, increases with surface inclination and decreases with inlet concentration of the flow
  4. Keywords:
  5. Analytical and experimental investigation ; Critical densimetric froude number ; Density jump ; Flow of fluids ; Froude number ; Hydraulic jump ; Densimetric Froude number ; Density jumps ; Experimental investigations ; Inclined surface ; Integral method ; Inlet flow
  6. Source: Scientia Iranica ; Vol. 21, Issue. 5 , 2014 , pp. 1655-1665 ; ISSN :1026-3098
  7. URL: http://www.scientiairanica.com/en/ManuscriptDetail?mid=286