Results 101 to 110 of about 3,784,212 (129)

The Effect of Gravity and Shear Stress on a Liquid Film Driven in a Horizontal Minichannel at Local Heating

Microgravity Science and Technology, 2009
The present study is focused on the investigation of gravity effect on thermocapillary deformations in a film flowing under action of co-current gas flow, which creates the tangential force on the gas–liquid interface. The influence of local heating intensity on the heater at a substrate is also investigated.
Kabova, Yulia, Kuznetsov, V. V., Kabov, Oleg   +2 more
openaire   +2 more sources

Interfacial shear stress in wavy stratified gas–liquid flow in horizontal pipes

International Journal of Multiphase Flow, 2013
Abstract The scope of this study was to improve the Andritsos-Hanratty model for estimating interfacial friction factor and pressure drop in horizontal stratified gas–liquid two-phase flow. New experimental results (focusing on the effects of gas density and surface tension), combined with experimental data available in the literature, permit the ...
Christina Tzotzi, Nikolaos Andritsos
openaire   +1 more source

Gas-wall shear stress distribution in horizontal stratified two-phase flow

International Communications in Heat and Mass Transfer, 1999
Abstract Gas-wall shear stresses in the stratified gas-liquid flow in pipes are obtained using Preston's method for measuring skin friction in the turbulent boundary layer. The non-dimensional relationship between the Preston tube reading and wall shear stress over a wide range of single-phase gas flow rates is reported. The wall shear stresses up to
Somchai Wongwises, Apichart Pornsee, Egarin Siroratsakul   +2 more
openaire   +1 more source

Evaluation of Residual Stress States Using Horizontally Polarized Shear Waves

1983
A new approach for using acoustic measurements to evaluate residual stresses in the presence of unknown material property variations is presented. It is shown that measurements using shear waves propagating along the normal to the surface of a plate do not provide sufficient information to separate the influences of stress and material property ...
King, R., Fortunko, C.
openaire   +2 more sources

Estimation of formation horizontal stress magnitudes using radial profiles of shear slownesses

International Meeting for Applied Geoscience & Energy, 2009
A new inversion algorithm yields estimates of the maximum and minimum horizontal stresses using radial profiles of the three shear moduli referred to an orthogonal set of axes defined by the three principal stress directions. This algorithm inverts differences in the far-field shear moduli together with two difference equations obtained from the radial
Bikash Sinha, Tom Bratton, Shannon Higgins   +2 more
openaire   +1 more source

A note on the constancy of horizontal turbulent shearing stress in the lower layers of the atmosphere

Quarterly Journal of the Royal Meteorological Society, 1939
AbstractIt may readily be shown, from elementary arguments, that for steady fluid flow in circular tubes or between parallel plates, the shear stress in the direction of the mean motion varies linearly with the distance from the wall. This result is quite independent of the nature and origin of the fluid resistance and in particular is valid if the ...
openaire   +1 more source

Horizontal Stress Magnitude Estimation Using the Three Shear Moduli - A Norwegian Sea Case Study

Proceedings of SPE Annual Technical Conference and Exhibition, 2006
AbstractFormation stresses play an important role in geophysical prospecting and development of oil and gas reservoirs. A reliable in-situ stress determination is a premise for all geomechanical evaluations of a reservoir including initial drilling, infill drilling, sand prediction, stimulation and fracturing, well integrity evaluation, coupling with ...
B. K. Sinha, B. Vissapragada, L. Renlie, E. Skomedal   +3 more
openaire   +1 more source

Effect of initial stress on propagation behaviors of shear horizontal waves in piezoelectric/piezomagnetic layered cylinders

Ultrasonics, 2015
An analytical approach is taken to investigate shear horizontal wave (SH wave) propagation in layered cylinder with initial stress, where a piezomagnetic (PM) material thin layer is bonded to a piezoelectric (PE) cylinder. Two different material combinations are taken into account, and the phase velocities of the SH waves are numerically calculated for
X, Zhao, Z H, Qian, S, Zhang, J X, Liu
openaire   +2 more sources

Determination of in-plane residual stress states in plates using horizontally polarized shear waves

Journal of Applied Physics, 1983
In this paper a new approach for using acoustic measurements to evaluate residual stresses in the presence of unknown material property variation is presented. Procedures previously applied to the evaluation of stress with acoustic measurements are reviewed, and it is shown that these involve using measurements with bulk waves propagating along the ...
R. B. King, C. M. Fortunko
openaire   +1 more source

Estimation of gas wall shear stress in horizontal stratified gas‐liquid pipe flow

AIChE Journal, 1996
Two-phase pipe flows occur in many industrial applications, such as condensers and evaporators, chemical processing equipment, nuclear reactors, and oil pipelines. A variety of basic mechanistic flow models for predicting the pressure gradient and liquid loading characteristics of these types of flows to assist in design calculations has emerged over ...
Charles H. Newton, Masud Behnia
openaire   +1 more source