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). …”
Get full text
Get full text

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. …”
Get full text
Get full text

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). …”
Get full text

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. …”
Get full text

An experimental and simulation study of chip transportation behaviour in gundrilling by Tnay, Guan Leong

“…From the experiments, terminal velocities of typical gun drill chips at different range of particle Reynolds number were determined to construct the unique drag curve. Based on the findings, a computational fluid dynamic (CFD) numerical model was developed to predict the lateral drag forces with respect to the particle Reynolds number. …”
Get full text

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…”
Get full text

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. …”
Get full text

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. …”
Get full text

Black hole binary formation and mergers in supermassive black hole discs by Rowan, C

“…A single range of impact parameters, typically of width $\sim0.8-1.6$ binary Hill radii (depending on the AGN disk density) reliably leads to binary formation. …”