Levitated droplet oscillations: effect of internal flow

2009 ◽  
Vol 45 (3) ◽  
pp. 475-486 ◽  
Keyword(s):  
Internal Flow ◽  
Levitated Droplet

GS0511 Internal flow and oscillations of an electrostatically levitated droplet

2016 ◽  
Vol 2016.22 (0) ◽  
pp. _GS0511-1_-_GS0511-2_
Author(s):  
Masaharu NOGUCHI ◽  
Soma WATAHIKI ◽  
Satoshi MATSUMOTO ◽  
Tetsuya KANAGAWA ◽  
Akiko KANEKO ◽  
...  
Keyword(s):  
Internal Flow ◽  
Levitated Droplet

scholarly journals PIV measurement of internal flow in a levitated droplet

2007 ◽  
Vol 27 (Supplement1) ◽  
pp. 235-236
Author(s):  
Yutaka ABE ◽  
Yuji YAMAMOTO ◽  
Daisuke HYUGA ◽  
Shigeru AWAZU
Keyword(s):  
Internal Flow ◽  
Piv Measurement ◽  
Levitated Droplet

Interfacial stability and internal flow of a levitated droplet

2007 ◽  
Vol 19 (3-4) ◽  
pp. 33-34 ◽  
Author(s):  
Yutaka Abe ◽  
Yuji Yamamoto ◽  
Daisuke Hyuga ◽  
Kazuyoshi Aoki ◽  
Akiko Fujiwara
Keyword(s):  
Internal Flow ◽  
Interfacial Stability ◽  
Levitated Droplet

Internal Flow of Acoustically Levitated Droplet

2008 ◽  
Vol 20 (3-4) ◽  
pp. 277-280 ◽  
Author(s):  
Yuji Yamamoto ◽  
Yutaka Abe ◽  
Akiko Fujiwara ◽  
Koji Hasegawa ◽  
Kazuyoshi Aoki
Keyword(s):  
Internal Flow ◽  
Levitated Droplet

scholarly journals Stereo PIV Measurement on Incipient Mechanism of Internal Flow in an Acoustically Levitated Droplet

2009 ◽  
Vol 29-1 (1) ◽  
pp. 235-235
Author(s):  
Akiko KANEKO ◽  
Yuji YAMAMOTO ◽  
Koji HASEGAWA ◽  
Yutaka ABE
Keyword(s):  
Internal Flow ◽  
Piv Measurement ◽  
Levitated Droplet

Investigation of the natural ventilation of wind catchers with different geometries in arid region houses

2020 ◽  
Vol 14 (3) ◽  
pp. 7109-7124
Author(s):  
Nasreddine Sakhri ◽  
Younes Menni ◽  
Houari Ameur ◽  
Ali J. Chamkha ◽  
Noureddine Kaid ◽  
...  
Keyword(s):  
Arid Region ◽  
Natural Ventilation ◽  
Reduction Rate ◽  
Internal Flow ◽  
Climatic Conditions ◽  
Maximum Pressure ◽  
Ventilation Technique ◽  
Window Position ◽  
The One ◽  
Flow Velocities

The wind catcher or wind tower is a natural ventilation technique that has been employed in the Middle East region and still until nowadays. The present paper aims to study the effect of the one-sided position of a wind catcher device against the ventilated space or building geometry and its natural ventilation performance. Four models based on the traditional design of a one-sided wind catcher are studied and compared. The study is achieved under the climatic conditions of the South-west of Algeria (arid region). The obtained results showed that the front and Takhtabush’s models were able to create the maximum pressure difference (ΔP) between the windward and leeward of the tower-house system. Internal airflow velocities increased with the increase of wind speed in all studied models. For example, at Vwind = 2 m/s, the internal flow velocities were 1.7, 1.8, 1.3, and 2.5 m/s for model 1, 2, 3, and 4, respectively. However, at Vwind = 6 m/s, the internal flow velocities were 5.6, 5.5, 2.5, and 7 m/s for model 1, 2, 3, and 4, respectively. The higher internal airflow velocities are given by Takhtabush, traditional, front and middle tower models, respectively, with a reduction rate between the tower outlet and occupied space by 72, 42, 36, and 33% for the middle tower, Takhtabush, traditional tower, and the front model tower, respectively. This reduction is due to the due to internal flow resistance. The third part of the study investigates the effect of window (exist opening) position on the opposite wall. The upper, middle and lower window positions are studied and compared. The air stagnation or recirculation zone inside the ventilated space reduced from 55% with the lower window to 46% for the middle window and reached 35% for the upper window position. The Front and Takhtabush models for the one-sided wind catcher with an upper window position are highly recommended for the wind-driven natural ventilation in residential houses that are located in arid regions.

Experimental and Numerical Analysis of a Motorcycle Air Intake System Aerodynamics and Performance

2020 ◽  
Vol 17 (1) ◽  
Author(s):  
M. A. Abd Halim ◽  
N. A. R. Nik Mohd ◽  
M. N. Mohd Nasir ◽  
M. N. Dahalan
Keyword(s):  
Combustion Process ◽  
Three Dimensional ◽  
Engine Performance ◽  
Internal Flow ◽  
Rapid Expansion ◽  
Navier Stokes ◽  
Turbulent Fluctuation ◽  
Ansys Fluent ◽  
Induction System ◽  
Acceleration And Deceleration

Induction system or also known as the breathing system is a sub-component of the internal combustion system that supplies clean air for the combustion process. A good design of the induction system would be able to supply the air with adequate pressure, temperature and density for the combustion process to optimizing the engine performance. The induction system has an internal flow problem with a geometry that has rapid expansion or diverging and converging sections that may lead to sudden acceleration and deceleration of flow, flow separation and cause excessive turbulent fluctuation in the system. The aerodynamic performance of these induction systems influences the pressure drop effect and thus the engine performance. Therefore, in this work, the aerodynamics of motorcycle induction systems is to be investigated for a range of Cubic Feet per Minute (CFM). A three-dimensional simulation of the flow inside a generic 4-stroke motorcycle airbox were done using Reynolds-Averaged Navier Stokes (RANS) Computational Fluid Dynamics (CFD) solver in ANSYS Fluent version 11. The simulation results are validated by an experimental study performed using a flow bench. The study shows that the difference of the validation is 1.54% in average at the total pressure outlet. A potential improvement to the system have been observed and can be done to suit motorsports applications.

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