... to the theoretical model, and measurement accuracy. 01 05 2011 10 10 2011 20 12 2011 20 12 2011 boundary layer turbulence flow simulation heat exchangers laminar flow laminar to turbulent transitions microchannel flow Navier-Stokes equations pipe flow micro-channels laminar...

... convection flow simulation jets laminar to turbulent transitions numerical analysis shear flow vortices Mattingly and Chang [( 4 )] found that for the top-hat velocity profile, the axisymmetric mode is dominant, while for the far-field velocity profile the helical mode is dominant. As described...

.... The time from the start of the flow to the initiation of turbulence can be predicted by an empirical formula. 08 07 2010 03 06 2011 05 07 2011 05 07 2011 laminar flow laminar to turbulent transitions pipe flow turbulence Nomenclature A  = acceleration [m/s 2...

... Narasimha , R. , 1985 , “ The Laminar-Turbulent Transition Zone in the Boundary Layer ,” Prog. Aerosp. Sci. , 22 , pp. 29 – 80 . 10.1016/0376-0421(85)90004-1 28 Suder , K. L. , O’Brien , J. E. , and Reshotko , E. , 1988 , “ Experimental Study of Bypass Transition in a Boundary...

... 2010 31 08 2010 09 11 2010 09 11 2010 flow measurement laminar to turbulent transitions multiphase flow pipe flow turbulence velocity measurement transition to turbulence turbulent slug constant acceleration flow unsteady pipe flow transient flow...

... reduction with increase in the side injection velocity. 22 11 2007 25 08 2010 06 10 2010 06 10 2010 flow instability jets laminar flow laminar to turbulent transitions mixing pipe flow shear turbulence Flow in the form of a jet is preferred for their better mixing...

... 09 2010 flow visualisation laminar to turbulent transitions pipe flow turbulence transition accelerating flow initial steady flow critical Reynolds number a acceleration D pipe diameter Re Reynolds number Re t r critical...

... 01 2010 blades drops laminar to turbulent transitions pumps rocket engines two-phase flow Space launcher turbopumps are characterized by fast startups; actually, the time delay between the inception of the shaft rotation and the nominal flow conditions is usually close to one...

... , “ An Experimental Study of Turbulence Production Near a Smooth Wall in a Turbulent Boundary Layer With Zero Pressure Gradient ,” Stanford University, CA, Report No. MD-20. boundary layer turbulence computational fluid dynamics external flows finite difference methods laminar flow laminar to turbulent...

... laminar to turbulent transitions pipe flow turbulence pipe flow turbulent flow friction factor tripping effect Turbulence is a complex phenomenon, endowing fluid flows with properties that remain generally unknown, although they are directly influenced by the initial and boundary...

... to the turbulent flow is expected. Nishi et al. ( 40 ) obtained a pipe natural laminar-to-turbulent transition at x / D = 533.3 for Re m = 11.5 × 10 3 , utilizing Durst and Ünsal’s ( 41 ) pipe facility, who had a slightly higher value Re m = 13 × 10 3...

... in parallel flow at zero incidence was studied in a subsonic wind tunnel. Experiments were performed for 15 m/s and 22 m/s. They showed that electric discharges ( ± 8 kV, 1 kHz) acting on a laminar flow tripped the laminar-to-turbulent transition. Moreover, higher applied voltages (up to ± 12 kV, 1 kHz) were...

... 18 05 2007 22 07 2008 calibration curvature measurement flow measurement flow simulation laminar flow laminar to turbulent transitions measurement standards size measurement turbulence Measured discharge coefficient of CFVs 8 (left) and CFV 9 (right) versus predicted...

... 09 2007 04 02 2008 29 04 2008 hysteresis laminar to turbulent transitions pipe flow Laminar-turbulent transition in pipe flows is one of the fundamental problems of fluid dynamics and has been widely studied from experimental, numerical, and theoretical perspectives ( 1 2...

... , 34 ( 8 ), pp. 1570 – 1577 . Anderson , J. D. , 2005 , Fundamentals of Aerodynamics , 4th ed. , McGraw-Hill Higher Education , New York . aerodynamics boundary layer turbulence bubbles flow instability flow separation laminar flow laminar to turbulent transitions laser...

... to turbulent transitions nozzles turbulence jets transition to turbulence self-similarity in jets shear layer Reynolds number jet structures Jet flows are encountered in a variety of industrial applications dealing with cooling, mixing, or drying processes. Flow patterns associated...

... , pp. 400 – 403 . Mayle , R. E. , 1991 , “ The Role of Laminar-Turbulent Transition in Gas Turbine Engines ,” ASME J. Turbomach. 0889-504X , 113 , pp. 509 – 537 . Walsh , E. J. , and Davies , M. R. D. , 2003 “ Measurement and Prediction of Transition on the Suction...

... for the regularities in the turbulence spring-up time is proposed. 10 12 2004 27 12 2005 laminar to turbulent transitions flow instability pipe flow boundary layers Laplace transforms An abrupt transition from the laminar to the turbulent flow in pipes is common for start-up flows at high...

... 06 12 2005 natural convection forced convection Navier-Stokes equations laminar to turbulent transitions flow instability cooling flow simulation electric motors automotive components engines fans In the design process of new automotive engine cooling fan systems, one...

...P. D. Friedman 14 03 2005 01 12 2005 fluid oscillations waves jets laminar to turbulent transitions Jets and fountains with reversing buoyancy occur in numerous natural and man-made situations ( 1 ) including, for example, oxygen jets directed into molten metal...