Velocity measurements of turbulence collapse in a linearly stratified jet

Velocity measurements of turbulence collapse in a linearly stratified jet The behavior of a horizontal turbulent round jet␣in a linearly density-stratified fluid is studied and compared to the unstratified case using digital particle-tracking velocimetry (DPTV). Close to the nozzle, the stratified jet grows axisymmetrically at the same rate as an unstratified jet. At a critical distance downstream, the vertical growth is suppressed, while the lateral spreading increases. The self-similar nature of unstratified round jets is not preserved in the stratified case. The velocity field and turbulent stresses are affected by the stratification closer to the jet nozzle than is expected from the flow visualization observations. In particular, the vertical normal stress and shear stress are significantly reduced compared to the unstratified case. Experiments in Fluids Springer Journals

Velocity measurements of turbulence collapse in a linearly stratified jet

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Copyright © 2001 by Springer-Verlag Berlin Heidelberg
Engineering; Engineering Fluid Dynamics; Fluid- and Aerodynamics; Engineering Thermodynamics, Heat and Mass Transfer
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