Free surface flow under gravity and surface tension due to an applied pressure distribution: I Bond number greater than one-third

2005 ◽  
Vol 19 (4) ◽  
pp. 237-252 ◽  
Author(s):  
Montri Maleewong ◽  
Jack Asavanant ◽  
Roger Grimshaw
Keyword(s):  
Surface Tension ◽  
Free Surface ◽  
Pressure Distribution ◽  
Applied Pressure ◽  
Free Surface Flow ◽  
Bond Number ◽  
Surface Flow

Two methods of surface tension treatment in free surface flow simulations

2018 ◽  
Vol 86 ◽  
pp. 236-242 ◽  
Author(s):  
Kirill D. Nikitin ◽  
Kirill M. Terekhov ◽  
Yuri V. Vassilevski
Keyword(s):  
Surface Tension ◽  
Free Surface ◽  
Free Surface Flow ◽  
Surface Flow ◽  
Flow Simulations

Étude de formation de vortex au voisinage de l'aspiration verticale inversée dans un puits de pompage

1983 ◽  
Vol 10 (3) ◽  
pp. 369-383
Author(s):  
Tilena Kougnima ◽  
René Kahawita
Keyword(s):  
Surface Tension ◽  
Free Surface ◽  
Laboratory Investigation ◽  
Relative Position ◽  
Free Surface Flow ◽  
Surface Flow ◽  
Inertia Forces

The purpose of the laboratory investigation reported here has been to study the conditions under which vortices appear in the free surface flow upstream of a vertically inverted intake in a circular sump. The influence of geometry, approach conditions, size, and relative position of the intake in the sump has been studied. The effect of viscosity, surface tension, and inertia forces on the formation of vortices has been examined. A discussion of the results and the principal conclusions drawn permit certain recommendations to be made at the conceptual stage of pumping pits.

scholarly journals The effect of surface tension on free surface flow induced by a point sink in a fluid of finite depth

2017 ◽  
Vol 156 ◽  
pp. 526-533
Author(s):  
G.C. Hocking ◽  
H.H.N. Nguyen ◽  
T.E. Stokes ◽  
L.K. Forbes
Keyword(s):  
Surface Tension ◽  
Free Surface ◽  
Free Surface Flow ◽  
Finite Depth ◽  
Surface Flow ◽  
Effect Of Surface

scholarly journals Modelling free surface flow with curvilinear streamlines by a non-hydrostatic model

2016 ◽  
Vol 64 (3) ◽  
pp. 281-288
Author(s):  
Yebegaeshet T. Zerihun
Keyword(s):  
Free Surface ◽  
Hydrostatic Pressure ◽  
Pressure Distribution ◽  
Free Surface Flow ◽  
Higher Order ◽  
Surface Flow ◽  
Pressure Profiles ◽  
Proposed Model ◽  
Saint Venant Equations ◽  
Gravity Driven

Abstract This study addresses a particular phenomenon in open channel flows for which the basic assumption of hydrostatic pressure distribution is essentially invalid, and expands previous suggestions to flows where streamline curvature is significant. The proposed model incorporates the effects of the vertical curvature of the streamline and steep slope, in making the pressure distribution non-hydrostatic, and overcomes the accuracy problem of the Saint-Venant equations when simulating curvilinear free surface flow problems. Furthermore, the model is demonstrated to be a higher-order one-dimensional model that includes terms accounting for wave-like variations of the free surface on a constant slope channel. Test results of predicted flow surface and pressure profiles for flow in a channel transition from mild to steep slopes, transcritical flow over a short-crested weir and flow with dual free surfaces are compared with experimental data and previous numerical results. A good agreement is attained between the experimental and computed results. The overall simulation results reveal the satisfactory performance of the proposed model in simulating rapidly varied gravity-driven flows with predominant non-hydrostatic pressure distribution effects. This study suggests that a higher-order pressure equation should be used for modelling the pressure distribution of a curvilinear flow in a steeply sloping channel.

Calculation of the Three-Dimensional Free Surface Flow Around an Automobile Tire

1996 ◽  
Vol 24 (1) ◽  
pp. 39-49 ◽  
Author(s):  
H. Grogger ◽  
M. Weiss
Keyword(s):  
Free Surface ◽  
Pressure Distribution ◽  
Three Dimensional ◽  
Free Surface Flow ◽  
Equation System ◽  
Surface Flow ◽  
Automobile Tire ◽  
Drag Forces ◽  
On The Road ◽  
Lift And Drag

Abstract The 3D flow around a 195/65R15 automobile tire is calculated. To describe the free surface behavior with the usual conservation equations for mass and momentum, an additional equation for the water mass fraction is solved. For modeling the effects of turbulence, the well-known k,ε-model is used. The resulting fluid mechanics equation system is solved by a finite volume method. A finite element calculation considering inflation pressure and tire deflection gives the surface for the flow calculation. The goal is to determine the lift force of the tire at a certain velocity to predict the tendency of the tire to hydroplane. For a slick tire, the calculated pressure distribution in the water is presented. The lift and drag forces are evaluated from the pressure acting directly on the tire surface. The calculation is performed at three different velocities, 30, 60, and 90 km/h. A comparison with experimental data shows good agreement regarding the pressure distribution on the road in front of the tire.

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