Scaling of the velocity profile in strongly drag reduced turbulent flows over an oscillating wall by Skote, Martin

“…Scaling analysis of the velocity profiles in strongly drag reduced flows reveals that the slope of the logarithmic part depends on the amount of drag reduction (DR). …”
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Eccentricity effects of microhole arrays on drag reduction efficiency of microchannels with a hydrophobic wall by Kashaninejad, Navid, Nguyen, Nam-Trung, Chan, Weng Kong

“…Subsequently, the drag reduction performance of the microchannels with such hydrophobic microhole surfaces is evaluated. …”
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Computation fluid dynamics on drag reduction II by Zang, Bin

“…Both the flow pattern in the form of velocity contours and the quantitative drag coefficient are extracted and compared in several ways: single dimple along the wall with depth (h/D = 0.21); multiple (three) dimples along the wall with different separation distances between adjacent dimples; single dimple but with several other h/D ratios (i.e. 0.25, 0.14, 0.10, 0.08). …”
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Turbulent Flow over a Flexible Wall Undergoing a Streamwise Traveling Wavy Motion by Shen, Lian, Zhang, Xiang, Yue, Dick K.P., Triantafyllou, Michael S.

“…For negative c/U, we find that flow separation is enhanced and a large drag force is produced. For positive c/U, the results show that as c/U increases from zero, the separation bubble moves further upstream and away from the wall, and is reduced in strength. …”
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Large eddy simulation of ABL flow around a parabolic concave roof model by Zulfadli Bin Abdul Latiff

“…C_P decreases on both the windward wall and leeward wall as flow velocity increases. …”
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An experimental and simulation study of chip transportation behaviour in gundrilling by Tnay, Guan Leong

“…Coefficients of restitution as required to determine the rebound velocities after the chip collide to the wall were obtained via calibration against the experimental data. …”
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Slow viscous flow around two particles in a cylinder by Yao, Xin, Marcos, Wong, Teck Neng

“…The two solutions are performed in an iterated framework using the method of reflections. We compute the drag force and torque coefficients of the particles which are dependent on the distances among the cylinder wall and the two particles. …”
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Multi-scale and multiphase modeling of abrasive flow machining process with experimental validation by Mohamed Adel Abdelhakem Amen

“…Different from the common thought, the study proves that MR mechanism mainly comes from drag and impulse forces activated when the particle is blocked by surface asperity/protrusion…”
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