Results 221 to 230 of about 71,336 (264)

Unsteady fluid-dynamic force solely in terms of control-surface integral

Physics of Fluids, 2005
In experimental aerodynamics (and hydrodynamics) it is well known that, if the flow past a solid body is steady, then the total force on the body can be conveniently estimated by the measured flow data on an appropriate control surface alone. We now show that, for the first time, the steady-flow condition can be removed provided that the flow is ...
Wu, Jie-Zhi, Pan, Ze-Liang, Lu, Xi-Yun
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Prediction of fluid forces acting on a hand model in unsteady flow conditions

Journal of Biomechanics, 2008
The aim of this study was to develop a method to predict fluid forces acting on the human hand in unsteady flow swimming conditions. A mechanical system consisting of a pulley and chain mechanism and load cell was constructed to rotate a hand model in fluid flows. To measure the angular displacement of the hand model a potentiometer was attached to the
Shigetada, Kudo, Toshimasa, Yanai, Barry, Wilson, Hideki, Takagi, Ross, Vennell   +4 more
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Propulsive Vortical Patterns and Unsteady Fluid Forces of a Flapping Airfoil

Volume 1: Fora, Parts A, B, C, and D, 2003
It is known that a flapping airfoil can produce a thrust force through the generation of a reversed Ka´rma´n vortex street and this can be expected to be a new highly effective propulsion system. A flapping airfoil model was made and it was operated within a water channel.
Chang-Jo Yang, Masaki Fuchiwaki, Kazuhiro Tanaka   +2 more
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Force acting on a particle in unsteady flow of a pseudoplastic fluid

Journal of Applied Mechanics and Technical Physics, 2016
The accelerated flow of a pseudoplastic fluid around a quiescent sphere at Reynolds numbers Re = 0–200 and dimensionless acceleration Ga = 10–104 is studied by numerical simulation. It is shown that the analytical expression of the added mass force for an ideal fluid is appropriate for a pseudoplastic fluid. An expression for calculating the hereditary
O. B. Bocharov, Ya. S. Ignatenko
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Unsteady Forced Convection Heat Transfer for Power Law Fluids in a Pipe

2010 14th International Heat Transfer Conference, Volume 2, 2010
This paper studied the problem of forced convection heat transfer for power law fluids in a pipe which was affected by the varying inlet temperature. The fluid flow was hydrodynamically fully-developed and laminar while the effects of viscous dissipation and the power law kinematic viscosity on heat transfer were considered.
Botong Li, Liancun Zheng, Xinxin Zhang
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Unsteady Fluid Flow and Force on an Obstruction in a Pipe

Fluids Engineering, 2000
Abstract An unsteady fluid flow in a pipe with an orifice or an obstruction is studied. The velocity in the pipe and the force on the obstruction are calculated numerically. Several different forcing functions are considered for this unsteady flow system: a sinusoidal forcing function, a step forcing function, and a ramp forcing function.
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Computational Methods for Unsteady Fluid Force Predictions Using Moving Mesh Large Eddy Simulations

43rd AIAA Aerospace Sciences Meeting and Exhibit, 2005
The o w around a stream-wise oscillating circular cylinder in a steady uniform o w is computed using large eddy simulations (LES). A nite volume method with capability to handle moving meshes is employed. The results are used for comparison with experiments for validation of the algorithms.
Mattias Liefvendahl, Eric Lillberg
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UNSTEADY MOTION OF A SPHERE IN A NEWTONIAN FLUID: II. FORCE BOUNDARY CONDITIONS

Chemical Engineering Communications, 1988
Abstract A general framework is developed to determine the time-dependent particle velocity, velocity field, and pressure field of an incompressible Newtonian fluid in the creeping flow limit, when a force is applied to a rigid particle. The velocity and pressure fields far from the particle can be fully three-dimensional and the time-dependent ...
A.K. KULSHRESHTHA, J.M. CARUTHERS
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THE STUDY OF THE UNSTEADY FLUID-DYNAMIC FORCES ACTING ON AN AUTO ROTATING ELLIPTIC CYLINDER

Modern Physics Letters B, 2005
When a thin flat pate is released in the still air, the plate may fall aslant and automatically set into a rotational motion. This phenomenon is called autorotation. In this state, the unsteady fluid-dynamic forces act on the plate due to the vortex shedding and the rotation of the body.
Yasuda, Takahiro, Takano, Yasunari
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Unsteady conjugate forced convection heat/mass transfer in ensembles of Newtonian fluid spheres

International Journal of Heat and Mass Transfer, 2010
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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