Evolution of solid–liquid interface in bottom heated cavity for low Prandtl number using lattice Boltzmann method

2021 ◽  
Vol 33 (5) ◽  
pp. 057102
Author(s):  
Md Shahzad Hasan ◽  
Sandip K. Saha
Keyword(s):  
Prandtl Number ◽  
Lattice Boltzmann Method ◽  
Lattice Boltzmann ◽  
Liquid Interface ◽  
Solid Liquid Interface ◽  
Boltzmann Method ◽  
Solid Liquid

Research on the mechanism of drag reduction by wall vibration through Lattice Boltzmann method

2020 ◽  
Vol 34 (27) ◽  
pp. 2050295
Author(s):  
Jia Zhen Zhao ◽  
Guang Pan ◽  
Shan Gao
Keyword(s):  
Drag Reduction ◽  
Lattice Boltzmann Method ◽  
Lattice Boltzmann ◽  
Normal Vibration ◽  
Liquid Interface ◽  
Geometry Model ◽  
Vibration Parameters ◽  
Solid Liquid Interface ◽  
Boltzmann Method ◽  
Solid Liquid

In this paper, the hydrodynamics of streamwise and normal vibration wall are studied using the Lattice Boltzmann method. Firstly, based on the two-dimensional flow geometry model, which is made up of flat wall and water fluid, the characters of the fluid near the streamwise and normal vibration wall are simulated under the condition of mutative vibration parameters. By rigorous data treating, some notable results such as the velocity distribution, density distribution curves of the flow field, and the frictional force of the solid-liquid interface are gained. Secondly, the reason of the change of frictional resistance at the solid-liquid interface by wall vibration are studied. And the results are evidence that well drag reduction effect can be obtained by applying appropriate flow vibration parameters to the solid wall. In addition, the reduction in fluid density near the solid-liquid wall is another significant cause behind the frictional drag decrease.

Transient Freezing of Liquids in Turbulent Flow inside Tubes

1979 ◽  
Vol 101 (3) ◽  
pp. 465-468 ◽  
Author(s):  
Chul Cho ◽  
M. N. O¨zis¸ik
Keyword(s):  
Heat Flux ◽  
Prandtl Number ◽  
Turbulent Flow ◽  
Circular Tube ◽  
Freezing Temperature ◽  
Liquid Interface ◽  
Wall Heat Flux ◽  
Uniform Temperature ◽  
Solid Liquid Interface ◽  
Solid Liquid

The problem of freezing of a liquid in turbulent flow inside a circular tube whose wall is kept at a uniform temperature lower than the freezing temperature of the liquid is solved. The radius of the solid-liquid interface and the local wall heat flux are determined as a function of time and position along the tube for several different values of the Prandtl number and the freezing parameter.

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