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BRIDGE PIERS—DRAG FORCE COEFFICIENTS
ISH Journal of Hydraulic Engineering, 2004ABSTRACT The rational approach for estimating afflux at bridge constrictions requires the knowledge of drag coefficient. This paper presents experimental investigations on the variation of drag coefficient with Reynolds number for piers with semicircular nose and tail and lens-shaped nose and tail considering the effects of flow contraction and length ...
P. Mallikarjuna +3 more
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2016
When a steel ball is dropped into a water pool, it will continue to sink with a terminal velocity. If the ball is dropped onto a sandbox, it usually stops suddenly in the vicinity of the surface. How can we classify these two cases in terms of physics? To answer this question, the impact drag force must be a key factor.
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When a steel ball is dropped into a water pool, it will continue to sink with a terminal velocity. If the ball is dropped onto a sandbox, it usually stops suddenly in the vicinity of the surface. How can we classify these two cases in terms of physics? To answer this question, the impact drag force must be a key factor.
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Drag forces in Bingham plastics
Rheologica Acta, 1969A series of visualisation studies of the slow flow ofBingham plastics round bodies of various shapes led to the conclusion that the drag is not simply due to the effective volume of the body being increased by the presence of an enveloping layer of stagnantBingham plastic round the body.
G. F. Brookes, R. L. Whitmore
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The drag force on a moving dislocation. II. Nonzero temperature (thermal drag force)
Journal of Applied Physics, 1979In this part of the paper we consider the effect of the thermal motion of the atoms on the dynamics of a moving dislocation in the linear chain model. We express the effect in terms of a thermal drag force averaged over a lattice step. We compute this drag force for a range of dislocation velocities through computer simulation single-step runs. In each
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The drag force on a moving dislocation, I. Zero temperature (lattice drag force)
Journal of Applied Physics, 1979The kinematics and equations of motion of an equivalent single-degree-of-freedom system for a moving dislocation in a modified Frenkel-Kontorova linear-chain model are derived and then used in conjunction with computer simulation runs. The average drag force on a moving dislocation at zero temperature (lattice drag force) is computed for a range of ...
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2011
In this chapter we return to our study of non-adiabatic effects on the forces in collision cascades. In this case we examine the behaviour of the non-adiabatic force on the moving ions. Various attempts have been made to capture the effects of such forces in classical MD simulations by adding a drag force to the ionic dynamics. Our time-dependent tight-
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In this chapter we return to our study of non-adiabatic effects on the forces in collision cascades. In this case we examine the behaviour of the non-adiabatic force on the moving ions. Various attempts have been made to capture the effects of such forces in classical MD simulations by adding a drag force to the ionic dynamics. Our time-dependent tight-
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Drag Forces on Large Cylinders
River Research and Applications, 2015AbstractIntroducing large woody debris into streams is a common practice in restoration projects. Beyond the complexity of flow patterns and sediment movements in streams where woody debris are found or placed, it seems that our understanding of the basic hydraulics of large roughness elements in small channels remains limited. Underestimating the drag
Benoit Turcotte +2 more
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Drag, lift, and virtual mass forces
2007The pressure distribution around a particle moving in a continuum is nonuniform. Integrating the pressure distribution over the surface one obtains a resulting force that is different from zero. As shown in Vol. I, Chapter 6.2, the different spatial components of the integral correspond to different forces: drag, lift and virtual mass forces.
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Drag forces in granular materials
Soft MatterThis tutorial review introduces some non-trivial properties of the drag force experienced by objects moving through granular materials, including dependencies on the velocity of the object and the pressure around it, and associated scaling laws.
Pierre Rognon, François Guillard
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