Buoyant Jet Solution with Synthetic Entrainment Function

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by Daniel T. Chan, Bechtel Civil & Minerals Inc, Los Angeles, CA, USA,

Document Type: Proceeding Paper

Part of: Water for Resource Development

Abstract: A synthetic entrainment function is proposed for buoyant jets discharged at an arbitrary angle into otherwise quiescent ambient fluids. The entrainment function consists of two separate components, one representing entrainment of ambient fluids into the jet due to initial momentum, the other accounting for the effect of buoyancy, each with a constant entrainment coefficient. A numerical solution of the governing integral equations based on the conservation of mass, momentum, buoyancy and kinematic relations has been obtained using the proposed entrainment function. The solution is compared with experimental data and published numerical solutions based on other types of entrainment formulation. An improved overall agreement with the experimental data has been achieved. Graphical charts of representative solutions are presented.

Subject Headings: Entrainment | Jets (fluid) | Buoyancy | Numerical methods | Fluid flow | Water discharge | Arbitration | Integrals |

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