scholarly journals Formation and evolution of roll waves in a shallow free surface flow of a power-law fluid down an inclined plane

Wave Motion ◽  
2021 ◽  
pp. 102799
Author(s):  
Alexander Chesnokov
Keyword(s):  
Free Surface ◽  
Power Law ◽  
Free Surface Flow ◽  
Surface Flow ◽  
Power Law Fluid ◽  
Inclined Plane ◽  
Roll Waves ◽  
Formation And Evolution

Steady Free Surface Flow of a Fluid-Solid Mixture Down an Inclined Plane

2004 ◽  
Vol 22 (3) ◽  
pp. 253-273 ◽  
Author(s):  
P. RAVINDRAN ◽  
N. K. ANAND ◽  
M. MASSOUDI
Keyword(s):  
Free Surface ◽  
Free Surface Flow ◽  
Surface Flow ◽  
Inclined Plane ◽  
Solid Mixture

Numerical analysis of roll waves in chutes

2014 ◽  
Vol 15 (3) ◽  
pp. 517-524 ◽  
Author(s):  
Jalal Bazargan ◽  
Behrouz Aghebatie
Keyword(s):  
Free Surface ◽  
Flood Control ◽  
Fluid Model ◽  
Dynamic Pressure ◽  
Free Surface Flow ◽  
Surface Flow ◽  
Numerical Predictions ◽  
Roll Waves ◽  
Volume Of Fluid Model ◽  
The Difference

Uniform flow will become unstable when the channel slope is very steep. When this happens, the free surface will form a series of roll waves. This paper, using the Fluent software and applying the volume of fluid model to simulate free surface flow and the k – ε turbulence model, analyzes conditions for roll wave formation in free surface flow with the aim of predicting their occurrence in chutes. This study describes how the type of cross-section of the chutes influences the formation of roll waves. Hydraulic characteristics of the flow in the physical model of the flood control structure for Azad Dam spillway, which consists of a side spillway, chute, and flip, are three-dimensionally simulated. Numerical predictions were compared against the experimental data and results show that there is a good agreement between numerical and experimental results. Results indicate that an increase in side slope tends towards flow stability and the slower formation of rolling waves. Also, the rolling waves are expected to be generated for sections of the chute when the difference between the maximum dynamic pressure and the minimum dynamic pressure in those sections is above 9,000 Pa.

scholarly journals Laminar free-surface flow into a vertical cylinder

1975 ◽  
Vol 3 (1) ◽  
pp. 51-68 ◽  
Author(s):  
Thomas G. Smith ◽  
J.O. Wilkes
Keyword(s):  
Free Surface ◽  
Vertical Cylinder ◽  
Free Surface Flow ◽  
Surface Flow

Free-Surface Flow Simulations With Interactively Moving Bodies

2017 ◽  
Author(s):  
Arthur E. P. Veldman ◽  
Henk Seubers ◽  
Peter van der Plas ◽  
Joop Helder
Keyword(s):  
Free Surface ◽  
Free Fall ◽  
Free Surface Flow ◽  
Surface Flow ◽  
Numerical Solution Method ◽  
Flow Simulations ◽  
Floating Object ◽  
Offshore Industry ◽  
Floating Objects ◽  
Moving Bodies

The simulation of free-surface flow around moored or floating objects faces a series of challenges, concerning the flow modelling and the numerical solution method. One of the challenges is the simulation of objects whose dynamics is determined by a two-way interaction with the incoming waves. The ‘traditional’ way of numerically coupling the flow dynamics with the dynamics of a floating object becomes unstable (or requires severe underrelaxation) when the added mass is larger than the mass of the object. To deal with this two-way interaction, a more simultaneous type of numerical coupling is being developed. The paper will focus on this issue. To demonstrate the quasi-simultaneous method, a number of simulation results for engineering applications from the offshore industry will be presented, such as the motion of a moored TLP platform in extreme waves, and a free-fall life boat dropping into wavy water.

Model coupling techniques for free-surface flow problems: Part II

2005 ◽  
Vol 63 (5-7) ◽  
pp. e1897-e1908 ◽  
Author(s):  
E. Miglio ◽  
S. Perotto ◽  
F. Saleri
Keyword(s):  
Free Surface ◽  
Free Surface Flow ◽  
Surface Flow ◽  
Model Coupling ◽  
Flow Problems ◽  
Coupling Techniques
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