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Keyword: Turbulence
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Proceedings Papers

Proc. ASME. HT2012, Volume 2: Heat Transfer Enhancement for Practical Applications; Fire and Combustion; Multi-Phase Systems; Heat Transfer in Electronic Equipment; Low Temperature Heat Transfer; Computational Heat Transfer, 21-30, July 8–12, 2012
Paper No: HT2012-58045
... Longitudinal and transverse pressure-driven vortices induced by shear instabilities behind vortex generators play a crucial role in convective transport phenomena. The proven influence of these turbulence promoters on heat and mass transfer enhancement has led to their incorporation in modern...
Proceedings Papers

Proc. ASME. HT2012, Volume 2: Heat Transfer Enhancement for Practical Applications; Fire and Combustion; Multi-Phase Systems; Heat Transfer in Electronic Equipment; Low Temperature Heat Transfer; Computational Heat Transfer, 649-657, July 8–12, 2012
Paper No: HT2012-58273
... in time within the cycle period present the changing turbulence levels throughout the agitation cycle. The ensemble-averaged mean velocity variations show periods of acceleration, deceleration and flow reversal during a cycle as a result of agitator movement. Turbulence is found to increase toward...
Proceedings Papers

Proc. ASME. HT2008, Heat Transfer: Volume 1, 575-584, August 10–14, 2008
Paper No: HT2008-56228
... Experiments have been performed in a water tunnel facility to examine the physical mechanism of heat transfer augmentation by freestream turbulence in classical Hiemenz flow. A unique experimental approach to studying the problem is developed and demonstrated herein. Time-Resolved Digital...
Proceedings Papers

Proc. ASME. HT-FED2004, Volume 4, 213-216, July 11–15, 2004
Paper No: HT-FED2004-56890
... We report a new non-intrusive diagnostics technique for the simultaneous reconstruction of temperature ( T ) and soot volume fraction ( f v ) profiles in axi-symmetric turbulent luminous flames. Line-of-sight spectral radiation intensities ( I λ ) for one diametric and nine chord-like...
Proceedings Papers

Proc. ASME. HT-FED2004, Volume 1, 91-101, July 11–15, 2004
Paper No: HT-FED2004-56110
... The properties of steady round nonbuoyant turbulent jets in uniform crossflows were studied, motivated by applications to the dispersion of heat and potentially harmful substances from steady exhaust flows. Emphasis was placed on self-preserving conditions far from the source where source...
Topics: Jets, Turbulence
Proceedings Papers

Proc. ASME. HT-FED2004, Volume 1, 845-849, July 11–15, 2004
Paper No: HT-FED2004-56077
... In the context of recent work by Brocchini & Peregrine [1,2], this paper aims to document free surface profiles, and turbulence length scales in hydraulic jumps with Froude numbers between 1.98 and 4.82. Although information on bubble size, frequency and velocities in hydraulic jumps is...
Proceedings Papers

Proc. ASME. HT-FED2004, Volume 3, 469-477, July 11–15, 2004
Paper No: HT-FED2004-56181
... engineering turbulence closures, a consistent method is offered to bridge the gap between DNS, LES and RANS models. Based on the filter size, conditional averaging is adopted for the Navier-Stokes equation to introduce one more parameter into the definition of the eddy viscosity. Both time-dependent single...
Proceedings Papers

Proc. ASME. HT-FED2004, Volume 2, Parts A and B, 299-303, July 11–15, 2004
Paper No: HT-FED2004-56130
... Direct numerical simulations of a turbulent plane Couette flow are combined with Lagrangian scalar tracking of thermal markers that are released in the flow field to determine the behavior of an instantaneous scalar line source located at the wall. The resulting probability density functions are...
Proceedings Papers

Proc. ASME. HT2003, Heat Transfer: Volume 2, 21-34, July 21–23, 2003
Paper No: HT2003-47038
... The self-preserving properties of round turbulent thermals, puffs, starting plumes and starting jets, in unstratified and uniform crossflow, were investigated experimentally. The experiments involved dye-containing fresh water (for nonbuoyant flows) and salt water (for buoyant flows) sources...
Proceedings Papers

Proc. ASME. HT2003, Heat Transfer: Volume 3, 649-655, July 21–23, 2003
Paper No: HT2003-47103
... The k -ε model are performed to investigate numerically the steady, turbulent, incompressible flow and heat transfer converging radially between two stationary disks, which is as a continuously developing flow problem under the internal boundary layer approximations. The effect of...
Proceedings Papers

Proc. ASME. HT2003, Heat Transfer: Volume 2, 421-428, July 21–23, 2003
Paper No: HT2003-47230
... Analysis of incipience boiling was developed for five different types of organic liquids including water covering wide range of physical properties. Incipience in liquid films is influenced by turbulent eddies and liquid submergence. This approach utilizes physical parameters of commonly...