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Keywords: drag reduction
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Journal Articles
Article Type: Research Papers
J. Heat Transfer. October 2006, 128(10): 977–983.
Published Online: February 24, 2006
... fully turbulent. The existence of a critical temperature is a very interesting phenomenon since we can control the fluid temperature actively near the critical temperature region by thermal heating to get different values of DR and HTR for different purposes. In transport pipes, great drag reduction can...
Journal Articles
Article Type: Research Papers: Special Issue On Boiling And Interfacial Phenomena
J. Heat Transfer. August 2006, 128(8): 800–810.
Published Online: January 23, 2006
... Newtonian fluid flow like water through the same coils in the turbulent drag reduction region. Drag reduction and heat transfer reduction increase with an increase in surfactant solution concentration and temperature in the measured concentration and temperature ranges. On the other hand, they decrease...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. June 2006, 128(6): 564–570.
Published Online: December 23, 2005
... Navier-Stokes equations flow instability finite volume methods stagnation flow flow separation laminar to turbulent transitions wakes shear turbulence friction drag reduction heat transfer pressure drop lenticular elliptical cylinder cross flow subcritical flow The objective...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. June 2006, 128(6): 557–563.
Published Online: December 22, 2005
... to calculate Fanning friction factors and they are plotted versus Reynolds number in Fig. 3 . Also plotted in Fig. 3 are Virk’s ( 10 ) limiting maximum drag reduction asymptote (MDRA) for polymer Eq. 1 and Zakin’s ( 11 ) MDRA for surfactant Eq. 2 . 1 1 f f 1 ∕ 2 = 19 log 10...
Journal Articles
Article Type: Technical Notes
J. Heat Transfer. October 2003, 125(5): 947–950.
Published Online: September 23, 2003
... surfactants drag reduction turbulence channel flow non-Newtonian flow non-Newtonian fluids cryogenics transmission electron microscopy Heat Transfer Microstructures Non-Newtonian Polymers Rheological Thermal Turbulence Visualization Vortex Reduction of friction losses in turbulent...
Journal Articles
Article Type: Research Papers
J. Heat Transfer. August 2004, 126(4): 558–565.
Published Online: April 16, 2003
... to the heat carrier medium for a heat exchanger, these results reveal that the modified Reynolds number should be controlled in the turbulent region (Re ′ >2300) to require the effect of drag reduction. On the contrast, in order to need the effect...
Journal Articles
Article Type: Technical Papers
J. Heat Transfer. August 2001, 123(4): 779–789.
Published Online: November 20, 2000
... in a two-dimensional channel by utilizing the characteristic of fluid was studied. As the networks of rod-like micelles in surfactant solution are responsible for suppressing the turbulence in drag-reducing flow, destruction of the structure of networks was considered to eliminate the drag reduction...