scholarly journals MATHEMATICAL SIMULATION OF WATER DROP MOTION IN VERTICAL SHAFT VENTILATION

2019 ◽  
Vol 11 (4) ◽  
pp. 528-534
Author(s):  
Andrey FOMIN ◽  
◽  
Sergey KUZNETSOV ◽  
Keyword(s):  
Mathematical Simulation ◽  
Water Drop ◽  
Vertical Shaft ◽  
Drop Motion

A Design Method of Rain Test Device Based on Water Drop Motion Simulation

2013 ◽  
Vol 871 ◽  
pp. 363-368
Author(s):  
Hong Tao Zeng ◽  
Lin Lin Lin ◽  
Cong Feng ◽  
Zhi Huai Xiao
Keyword(s):  
Design Method ◽  
Water Drop ◽  
Electrical Equipment ◽  
Simulation Software ◽  
Test Device ◽  
Rainy Weather ◽  
Drop Motion ◽  
Water Drops ◽  
Motion Characteristics ◽  
Insulation Performance

In order to measure the electric insulation performance of the electrical equipment in rainy weather, its essential to design a rain device to simulate different conditions of rainfall. In this paper, a motion model of raindrop sprayed by the rain device and differential equations describing its motion characteristics are built. Basing on the analysis of water drop motion, a set of simulation software is developed for the selection of rain test device and the analysis of test results. The software can simulate the water drops motion process from nozzle to test equipment, and the simulation results is almost the same with field test, so the simulation software provides the basis for the design of rain test device.

A Contact Line Dynamic Model for a Conducting Water Drop on an Electrowetting Device

2016 ◽  
Vol 20 (3) ◽  
pp. 811-834 ◽  
Author(s):  
Dongdong He ◽  
Huaxiong Huang
Keyword(s):  
Contact Angle ◽  
Electric Field ◽  
Contact Line ◽  
Water Drop ◽  
Dynamic Contact Angle ◽  
Dynamic Contact ◽  
Apparent Contact Angle ◽  
Two Phase ◽  
Maximum Deformation ◽  
Drop Motion

AbstractThe static shape of drop under electrowetting actuation is well studied and recent electrowetting theory and experiments confirm that the local contact angle (microscopic angle) is unaffected while the apparent contact angle (macroscopic angle) is characterized by the Lippmann-Young equation. On the other hand, the evolution of the drop motion under electrowetting actuation has received less attention. In this paper, we investigate the motion of a conducting water drop on an electrowetting device (EWD) using the level set method. We derive a contact line two-phase flow model under electrowetting actuation using energy dissipation by generalizing an existing contact line model without the electric field. Our model is consistent with the static electrowetting theory as the dynamic contact angle satisfies the static Young's equation under equilibrium conditions. Our steady state results show that the apparent contact angle predicted by our model satisfies the Lippmann-Young's relation. Our numerical results based on the drop maximum deformation agree with experimental observations and static electrowetting theory. Finally, we show that for drop motion our results are not as good due to the difficulty of computing singular electric field accurately. Nonetheless, they provide useful insights and ameaningful first step towards the understanding of the drop dynamics under electrowetting actuation.

Small Scale Vertical Shaft Lime Kiln

1999 ◽  
Author(s):  
Kelvin Mason ◽  
Neville Hill ◽  
Otto Ruskulis ◽  
Alex Mugova ◽  
Peter Tawodzera ◽  
...  
Keyword(s):  
Small Scale ◽  
Vertical Shaft ◽  
Lime Kiln

Mathematical simulation of heat transfer during fluid flow for a fuel element with a polyzonal finned shell

2017 ◽  
Vol 20 (4) ◽  
pp. 58-63
Author(s):  
K. Maksymenko-Sheiko ◽  
◽  
Yu. Litvinova ◽  
T. Sheyko ◽  
M. Khazhmuradov ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Fluid Flow ◽  
Fuel Element ◽  
Mathematical Simulation
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