Abstract
The evolution of a buoyancy induced jet in a high-viscosity liquid with Pr = 2700 over a suddenly switched-on linear heat source is numerically investigated. The dependence of the velocity, temperature, and local heat fluxes on time has been investigated at a layer height of 50 mm and the Grashof number Gr = 172. Numerical simulation is performed using the finite element method. The complete system of equations of nonstationary thermogravitational convection for a two-dimensional flow is solved. The dependence of the spatial forms of flow and velocity fields on the power of the heat source is studied experimentally. Digital video shooting and computer processing of video films are used to determine the velocity fields. The results obtained can potentially be useful in the creation of adequate models of thermal plumes.
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