Experimental study of acoustic streaming in a high level standing wave guide: Influence of mean temperature and higher harmonics distribution

2012 ◽  
Author(s):  
I. Reyt ◽  
S. Moreau ◽  
H. Bailliet ◽  
J-C. Valière
Keyword(s):  
Experimental Study ◽  
Standing Wave ◽  
Acoustic Streaming ◽  
Wave Guide ◽  
Higher Harmonics ◽  
Mean Temperature ◽  
High Level

scholarly journals An Experimental Study on the Sources of Strontium in Mineral Water and General Rules of Its Dissolution—A Case Study of Chengde, Hebei

Water ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 699
Author(s):  
Ruifeng Wang ◽  
Xiong Wu ◽  
Yanliang Zhai ◽  
Yuxuan Su ◽  
Chenhui Liu
Keyword(s):  
Experimental Study ◽  
Mineral Water ◽  
Surrounding Rock ◽  
Mechanism Of Formation ◽  
High Quality ◽  
General Rules ◽  
Leaching Experiment ◽  
High Level ◽  
Impact Experiments

Chengde City boasts a wealth of high-quality mineral water resources characterized by a high level of strontium (Sr), a low level of sodium, and low alkalinity. In order to study the mechanism of formation of Sr-bearing mineral water in Chengde and to scientifically guide future mineral water exploration, taking three typical mineral water exploration areas in Chengde as examples, this paper studies the sources of Sr in mineral water and the general rules of its dissolution via a laboratory static leaching experiment and impact experiments, and it provides an analysis of the characteristics of typical rock samples. The research results indicate that the content of Sr in surrounding rock and the characteristics of minerals existing in surrounding rock jointly control the dissolution of Sr in water; that CO2 can promote the formation of mineral water containing Sr; and that temperature increases may boost the dissolution of Sr from carbonate minerals but also inhibit the dissolution of Sr from silicate minerals.

scholarly journals EXPERIMENTAL STUDY ON MANUFACTURE OF BLOCK-TYPE BUFFER FOR HIGH-LEVEL RADIOACTIVE WASTE DISPOSAL

2003 ◽  
pp. 203-208
Author(s):  
Hideo KOMINE ◽  
Nobuhide OGATA ◽  
Akira NAKASHIMA ◽  
Hajime TAKAO ◽  
Hiroyoshi UEDA ◽  
...  
Keyword(s):  
Experimental Study ◽  
Radioactive Waste ◽  
Waste Disposal ◽  
Radioactive Waste Disposal ◽  
Block Type ◽  
High Level Radioactive Waste ◽  
High Level

Influences of a temperature gradient and fluid inertia on acoustic streaming in a standing wave

2005 ◽  
Vol 117 (4) ◽  
pp. 1839-1849 ◽  
Author(s):  
Michael W. Thompson ◽  
Anthony A. Atchley ◽  
Michael J. Maccarone
Keyword(s):  
Temperature Gradient ◽  
Standing Wave ◽  
Acoustic Streaming ◽  
Fluid Inertia

Simulation of Acoustic Streaming in a Resonator

2004 ◽  
Author(s):  
Bakhtier Farouk ◽  
Murat K. Aktas
Keyword(s):  
Flow Field ◽  
Standing Wave ◽  
Oscillatory Flow ◽  
Stokes Equations ◽  
Acoustic Streaming ◽  
Flow Patterns ◽  
Vortical Flow ◽  
Navier Stokes ◽  
Navier Stokes Equations ◽  
Streaming Flow

Formation of vortical flow structures in a rectangular enclosure due to acoustic streaming is investigated numerically. The oscillatory flow field in the enclosure is created by the vibration of a vertical side wall of the enclosure. The frequency of the wall vibration is chosen such that a standing wave forms in the enclosure. The interaction of this standing wave with the horizontal solid walls leads to the production of Rayleigh type acoustic streaming flow patterns in the enclosure. All four walls of the enclosure considered are thermally insulated. The fully compressible form of the Navier-Stokes equations is considered and an explicit time-marching algorithm is used to explicitly track the acoustic waves. Numerical solutions are obtained by employing a highly accurate flux corrected transport (FCT) algorithm for the convection terms. A time-splitting technique is used to couple the viscous and diffusion terms of the full Navier-Stokes equations. Non-uniform grid structure is employed in the computations. The simulation of the primary oscillatory flow and the secondary (steady) streaming flows in the enclosure is performed. Streaming flow patterns are obtained by time averaging the primary oscillatory flow velocity distributions. The effect of the amount of wall displacement on the formation of the oscillatory flow field and the streaming structures are studied. Computations indicate that the nonlinearity of the acoustic field increases with increasing amount of the vibration amplitude. The form and the strength of the secondary flow associated with the oscillatory flow field and viscous effects are found to be strongly correlated to the maximum displacement of the vibrating wall. Total number of acoustic streaming cells per wavelength is also determined by the strength and the level of the nonlinearity of the sound field in the resonator.

Experimental Study on the Frequency of a Free Surface Fluctuation in a Vessel With or Without an Internal Structure

2009 ◽  
Author(s):  
Ho-Yun Nam ◽  
Byoung-Hae Choi ◽  
Jong-Man Kim ◽  
Byung-Ho Kim
Keyword(s):  
Experimental Study ◽  
Free Surface ◽  
Internal Structure ◽  
Standing Wave ◽  
Side Wall ◽  
Vessel Diameter ◽  
Dominant Frequency ◽  
Wave Region ◽  
Surface Fluctuation ◽  
Structure Water

An experimental study has been performed to investigate the frequency of a free surface fluctuation in a vessel with and without an internal structure. Water flows in from the bottom nozzle and flows out at the side wall nozzles. There are two dominant frequency regions which are generated by a standing wave and a jet. In the standing wave region, the frequency is well described by f(4πdV/g)1/2 = 1.07 in a circular vessel. The frequency generated by a jet can be described by a dimensionless period and Froude number according to its fluctuation stability. In the case of a vessel with an internal structure, it needs a geometry factor which is described by a vessel diameter to a hydraulic diameter ratio in a standing wave region.

Study of dynamics of value systems of youth’s leaders under pedagogical conditions of value-motivational development

2020 ◽  
pp. 23-27
Author(s):  
A.A. Oschepkov ◽  
◽  
V.V. Friauf
Keyword(s):  
Experimental Study ◽  
Leadership Development ◽  
Social Interaction ◽  
Theoretical Analysis ◽  
Value Systems ◽  
Study Results ◽  
Values Development ◽  
High Level ◽  
Group Interests

Presented is study in the problem of leadership in youth environment, in frames of which theoretical analysis of scientific works was conducted. The analysis showed, that the most actual in the present time is the value approach to leadership development for verification of which is experimental study is conducted. Results of the experiment showed dynamics of changes in values systems of both girls and boys during the period of conducting psycho-pedagogical program of values development. The analysis of experimental study results showed, that values orientations system of girls with high level of leader’s ability is oriented to social interaction, and values orientations system of boys with high level of leader’s ability is oriented to inner-group interests.

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