%0 Journal Article %T Theoretical and experimental investigation of density jump on an inclined surface %J Scientia Iranica %I Sharif University of Technology %Z 1026-3098 %A NAJAFPOUR, NATEGHEH %A SAMIE, MILAD %A FIROOZABADI, BAHAR %A AFSHIN, HOSSEIN %D 2014 %\ 10/01/2014 %V 21 %N 5 %P 1655-1665 %! Theoretical and experimental investigation of density jump on an inclined surface %K density jump %K inclined surface %K analytical and experimental investigation %K integral method %K critical densimetric Froude number %R %X The density jump on an inclined surface is analyzed using 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 densimetricFroude 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. %U https://scientiairanica.sharif.edu/article_3571_813d5160f1c7d9e55ce7a43cd7ec5834.pdf