Results 281 to 290 of about 32,763 (309)

On the drag coefficient of triangular profiles

Meccanica, 1988
Results of a laboratory study on the determination of the drag coefficient of triangular profiles simulating a train of sedimentary dunes are here presented. The study is carried out in a low speed wind tunnel by performing a direct measurement of the total drag force acting on one of the profiles and then subtracting the skin shear force to obtain the
openaire   +1 more source

Drag coefficients for tumbling satellites.

Journal of Spacecraft and Rockets, 1967
Figure 3 shows how typical PLOT results are presented. For illustrative purposes, ROD is plotted as a function of normal countdown time, which is extended by the programmed hold. Gain in PLOT is plotted as a function of programmed hold-time; the gain is referenced to RCD for the normal countdown.
LEE H. SENTMAN, STANFORD E. NEICE
openaire   +1 more source

The geostrophic drag coefficient and the ‘effective’ roughness length

Quarterly Journal of the Royal Meteorological Society, 1972
AbstractAn ‘effective’ roughness length is defined for use over heterogeneous terrain as the roughness length which homogeneous terrain would have to give the correct surface stress over a given area. A method is suggested to compute geostrophic drag coefficient, wind‐contour angle and surface heat flux, given this roughness length, latitude ...
F FIEDLER, HA PANOFSKY
openaire   +1 more source

Computation of the biot drag and virtual mass coefficients

International Journal of Multiphase Flow, 1988
The Biot equations model the propagation of acoustic waves in fluid- saturated porous media. The equations contain coefficients which depend upon the frequency and the fabric, or microstructure, of the solid constituent. Recently, a method [the second author, R. D. Costley and M. Stern, J. Acoust. Soc. Am. 76, 1804-1809 (1984; Zbl 0571.73109)] has been
Yavari, B., Bedford, A.
openaire   +2 more sources

On the drag and virtual mass coefficients in Biot’s equations

The Journal of the Acoustical Society of America, 1983
If the solid constituent of a fluid saturated porous medium is assumed to be subjected to a uniform oscillatory motion, Biot’s equations can be solved for the drag and virtual mass coefficients in terms of the resulting oscillatory motion of the fluid.
Bedford, A., Costley, R. D., Stern, M.
openaire   +1 more source

Drag Coefficients of Latticed Towers

Journal of Structural Engineering, 1986
Recent building codes require that wind loads be determined by multiplying a calculated velocity pressure by the drag coefficient of the structure.
openaire   +1 more source

Determination of the drag resistance coefficients of different vehicles

The Physics Teacher, 2018
While it has been demonstrated how air resistance could be analyzed by using mobile devices, this paper demonstrates a method of how to determine the drag resistance coefficient c of a commercial automobile by using the acceleration sensor of a smartphone or tablet. In an academic context, the drag resistance is often mentioned, but little attention is
Christoph Fahsl, Patrik Vogt
openaire   +1 more source

Drag Coefficients of Locomotion Over Viscous Soils

Journal of the Soil Mechanics and Foundations Division, 1960
To determine drag of wheel or track moving through mud, concepts of hydrodynamics pertaining to incompressible viscous fluids may be applied; problem is one of viscous flow around partially submerged object; variation in pressure causes bulldozing effect in front of wheel, and wake behind wheel; pressure drag may be reduced by streamlining wheel ...
Ervin Hegedus, Robert S. Rowe
openaire   +1 more source

Drag coefficients in rarefied flow [PDF]

The X1 expansion tube of the Centre for Hypersonics at the University of Queensland has developed and studied a test facility for hypervelocity rarefied flow. Dr. Macrossan has proposed the approximate theory of the drag of a blunt body in rarefied flow which is a modification of Whitfield’s theory (Macrossan, 2002b).
openaire   +1 more source

DRAG COEFFICIENT

A-to-Z Guide to Thermodynamics, Heat and Mass Transfer, and Fluids Engineering, 2006
I. V. Chircov, Y. V. Polezhaev
openaire   +1 more source