Excitation of nonlinear acoustic resonances by unsteady heat input

1979 ◽  
Vol 65 (2) ◽  
pp. 324-335
Author(s):  
D. S. Whitehead ◽  
D. K. Holger
Keyword(s):  
Heat Input ◽  
Nonlinear Acoustic ◽  
Acoustic Resonances

A note on nonlinear acoustic resonances in rectangular cavities

1978 ◽  
Vol 87 (2) ◽  
pp. 299-303 ◽  
Author(s):  
Jakob J. Keller
Keyword(s):  
Shock Waves ◽  
Resonant Frequency ◽  
Present Theory ◽  
Rectangular Cavity ◽  
Two Dimensional ◽  
Resonant Response ◽  
Nonlinear Acoustic ◽  
Acoustic Resonances ◽  
Discontinuous Pressure

The problem of the resonant response of a gas contained in a two-dimensional rectangular cavity to periodic (sinusoidal) velocity excitations at the walls of the cavity is investigated. It is found that in some neighbourhood of each resonant frequency there are discontinuous pressure disturbances (shock waves). The present theory is an extension of Chester's theory on resonances in closed tubes.

scholarly journals Nonlinear acoustic resonances to probe a threaded interface

2010 ◽  
Vol 107 (12) ◽  
pp. 124901 ◽  
Author(s):  
Jacques Rivière ◽  
Guillaume Renaud ◽  
Sylvain Haupert ◽  
Maryline Talmant ◽  
Pascal Laugier ◽  
...  
Keyword(s):  
Nonlinear Acoustic ◽  
Acoustic Resonances

Effect of the Heat Input on the Tensile Properties in Arc Brazing of Ferritic Stainless Steel using Cu-Si Insert Alloy

2010 ◽  
Vol 48 (04) ◽  
pp. 289-296 ◽  
Author(s):  
Myung-Bok Kim ◽  
Sang-Ju Kim ◽  
Bong-Keun Lee ◽  
Xinjian Yuan ◽  
Byoung-Hyun Yoon ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Tensile Properties ◽  
Ferritic Stainless Steel ◽  
Heat Input

Experimental and Numerical Simulation for Thermal Investigation of Oscillating Heat Pipe Using VOF Model

2020 ◽  
Vol 38 (1A) ◽  
pp. 88-104
Author(s):  
Anwar S. Barrak ◽  
Ahmed A. M. Saleh ◽  
Zainab H. Naji
Keyword(s):  
Thermal Resistance ◽  
Heat Pipe ◽  
Heat Input ◽  
Cfd Simulation ◽  
Working Fluid ◽  
Maximum Deviation ◽  
Inlet Temperature ◽  
Maximum Heat ◽  
Oscillating Heat Pipe ◽  
Vof Model

This study is investigated the thermal performance of seven turns of the oscillating heat pipe (OHP) by an experimental investigation and CFD simulation. The OHP is designed and made from a copper tube with an inner diameter 3.5 mm and thickness 0.6 mm and the condenser, evaporator, and adiabatic lengths are 300, 300, and 210 mm respectively.  Water is used as a working fluid with a filling ratio of 50% of the total volume. The evaporator part is heated by hot air (35, 40, 45, and 50) oC with various face velocity (0.5, 1, and 1.5) m/s. The condenser section is cold by air at temperature 15 oC. The CFD simulation is done by using the volume of fluid (VOF) method to model two-phase flow by conjugating a user-defined function code (UDF) to the FLUENT code. Results showed that the maximum heat input is 107.75 W while the minimum heat is 13.75 W at air inlet temperature 35 oC with air velocity 0.5m/s. The thermal resistance decreased with increasing of heat input. The results were recorded minimum thermal resistance 0.2312 oC/W at 107.75 W and maximum thermal resistance 1.036 oC/W at 13.75W. In addition, the effective thermal conductivity increased due to increasing heat input.  The numerical results showed a good agreement with experimental results with a maximum deviation of 15%.

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