Jet-vortex Interaction: A Numerical Study

2009 ◽  
Author(s):  
Catalin G. Ilea ◽  
Pawel Kosinski ◽  
Alex C. Hoffmann ◽  
Theodore E. Simos ◽  
George Psihoyios ◽  
...  
Keyword(s):  
Numerical Study ◽  
Vortex Interaction

scholarly journals Numerical Analysis of Air Vortex Interaction with Porous Screen

Fluids ◽  
2021 ◽  
Vol 6 (2) ◽  
pp. 70
Author(s):  
Xudong An ◽  
Lin Jiang ◽  
Fatemeh Hassanipour
Keyword(s):  
Physical Properties ◽  
Vortex Ring ◽  
Numerical Study ◽  
Flow Behavior ◽  
Industrial Applications ◽  
Moving Mesh ◽  
Vortex Flows ◽  
Vortex Interaction ◽  
Piston Cylinder ◽  
Porous Screen

In many industrial applications, a permeable mesh (porous screen) is used to control the unsteady (most commonly vortex) flows. Vortex flows are known to display intriguing behavior while propagating through porous screens. This numerical study aims to investigate the effects of physical properties such as porosity, Reynolds number, inlet flow dimension, and distance to the screen on the flow behavior. The simulation model includes a piston-cylinder vortex ring generator and a permeable mesh constructed by evenly arranged rods. Two methods of user-defined function and moving mesh have been applied to model the vortex ring generation. The results show the formation, evolution, and characteristics of the vortical rings under various conditions. The results for vorticity contours and the kinetic energy dissipation indicate that the physical properties alter the flow behavior in various ways while propagating through the porous screens. The numerical model, cross-validated with the experimental results, provides a better understanding of the fluid–solid interactions of vortex flows and porous screens.

A numerical study of vortex interaction

1984 ◽  
Vol 146 ◽  
pp. 331-345 ◽  
Author(s):  
I. G. Bromilow ◽  
R. R. Clements
Keyword(s):  
Flow Visualization ◽  
Numerical Study ◽  
Experimental Studies ◽  
Shear Layers ◽  
Controlled Study ◽  
Vortex Interaction ◽  
Flow Conditions ◽  
Discrete Vortex ◽  
Vortex Model ◽  
Discrete Vortex Model

Flow visualization has shown that the interaction of line vortices is a combination of tearing, elongation and rotation, the extent of each depending upon the flow conditions. A discrete-vortex model is used to study the interaction of two and three growing line vortices of different strengths and to assess the suitability of the method for such simulation.Many of the features observed in experimental studies of shear layers are reproduced. The controlled study shows the importance and rapidity of the tearing process under certain conditions.

Numerical Study on Reduction of Transonic Blade-Vortex Interaction Noise

2000 ◽  
Vol 37 (5) ◽  
pp. 796-802 ◽  
Author(s):  
San-Yih Lin ◽  
Yan-Shin Chin ◽  
Bae-Yih Hwang
Keyword(s):  
Numerical Study ◽  
Vortex Interaction ◽  
Blade Vortex Interaction

scholarly journals Numerical Study of Microscale Shock-Vortex Interaction

2015 ◽  
Vol 2015 ◽  
pp. 1-8
Author(s):  
Hong Xiao
Keyword(s):  
Mach Number ◽  
Dissipation Rate ◽  
Numerical Study ◽  
Critical Role ◽  
Direct Simulation ◽  
Vortex Interaction ◽  
Numerical Studies ◽  
Strength Of Interaction ◽  
Vortex Size ◽  
Dominant Parameter

Numerical studies of microscale shock-vortex interaction were conducted by particle-based direct simulation of Monte Carlo (DSMC). The enstrophy is found to be increased in the strong microscale shock-vortex interaction, which is not observed in the previous DSMC studies within the limited cases. Investigations also show that the increase of the enstrophy results in an increase in dissipation rate during the strong interaction. The incoming Mach number, vortex size, and vortex Mach number turn out to play a critical role in the strength of interaction, which in turn govern the change in the dissipation rate and the increase or decrease in enstrophy during the microscale shock-vortex interaction. It is also observed that the incoming Mach number is the most dominant parameter, followed by vortex size and vortex Mach number, during the microscale shock-vortex interaction.

A Numerical Study on the Temperature Field of Oscillatory Flow Reactor with Conic Ring Baffles

2012 ◽  
Vol 455-456 ◽  
pp. 121-126 ◽  
Author(s):  
Peng Wu ◽  
Jia Wu ◽  
Wei Li
Keyword(s):  
Heat Transfer ◽  
Temperature Field ◽  
Oscillatory Flow ◽  
Flow Reactor ◽  
Numerical Study ◽  
Maximum Temperature ◽  
Vortex Interaction ◽  
3 Dimensional ◽  
Bias Flow ◽  
Experimental Researches

In published papers, the experimental researches have been carried out on heat transfer in Oscillatory Flow Reac-tors (OFRs) with annular baffles in both batch and continuous modes. It’s found that even with low net flow rates (or without net flow) the heat transfer properties of OFR can match turbu-lent pipe flow. But there’s no paper shows the micro-structure of temperature field in OFRs to illustrate the heat transfer mechan-ism. In this paper, we report our 3-dimensional numerical simu-lation results of heat transfer of OFR with novel conic ring baf-fles which is particularly suitable for liquid-solid systems. The temperature field of conic baffled OFR was obtained by using the commercial CFD package CFX11.0. It’s found that in “soft” mix-ing region the maximum temperature gradient lies approximate-ly in the middle of each cell, i.e. between the two pairs of vortices. It can be speculated that the convection caused by the intense vortex interaction leads to heat transfer essentially. When it’s global mixing, severe bias flow occurs. The temperature field becomes more chaotic and the heat convection is caused by more disordered vortex interaction.

Numerical study on the dynamics of a jet-vortex interaction

2011 ◽  
Vol 217 (11) ◽  
pp. 5103-5112 ◽  
Author(s):  
Catalin G. Ilea ◽  
Pawel Kosinski ◽  
Alex C. Hoffmann
Keyword(s):  
Numerical Study ◽  
Vortex Interaction
Sign in / Sign up

Export Citation Format

Share Document