چکیده مقاله
Density current is a dense fluid, which is continuously released from a source and spreads down a sloping surface inside a lighter , motionless fluid Associate CFD code has been written to describe salt solution density current, which propagates three dimensionallu in deep ambient water The equations of continuity , momentum conservation, and diffusion are solved simultaneously in the fixed Cartesian directions, on a non staggered grid using finite volume scheme The velocity pressure coupling is handled by SIMPLEC method Comparison of the computed velocity and concentration of the density currents with the experimental data shows a good agreement between them Analysis indicates that the dense layer spreads in all directions at a rare proportional to the entrainment coefficient Then it approaches a normal state after release and the flow behaves as 2 Department Depth – averaged parameters were calculated to obtain entrainment coefficient The results showed that entrainment coefficient decreases when Richardson number increases This result has the same trend as Ellison and Turner 1 experimental data The present model provides a physical understanding of such complex phenomena
کلیدواژهها
نویسندگان
شیوه ارجاع
Hormozi, sara and Firoozabadi, Bahar and Ghasvari jahromi, Hamed,1385,Entrainment in 3-D Density Currents,7th International Congress on Civil Engineering,Tehran
ارائهشده در
مجموعه مقالات هفتمین کنگره بین المللی مهندسی عمران17 اردیبهشت 1385 · تهران