J. Vijitha, S. S. Priya, K. C. Devi
PSG College of Technology, Coimbatore, Tamil Nadu, India
Sleep apnea is a type of sleep disorder characterized by pauses in breathing or instances of shallow or infrequent breathing during sleep. There is a need to diagnose sleep apnea since it leads to fluctuations in the oxygen level that in turn affect the heart rate and blood pressure. In order to detect this disorder, a Micro Electro Mechanical System (MEMS) based piezoelectric pressure sensor ...
Los Alamos National Lab, Los Alamos, NM, USA
Metal reed valves are used for flow rectification in electrohydraulic pumps driven by smart materials at high frequencies but it is difficult to predict their behavior when the surrounding fluid has considerable inertia and viscosity. Simulation of this phenomenon involves modeling the fluid-structure-interaction between the bending of the reed and the flow past the valve. In this model, we use ...
N. Martaj [1,2], S. Savarese , S. Kouidri , M. M. ALI [4,5]
 EPF Ecole d’ingénieurs, Montpellier, France
 Institut d'Electronique et des Systèmes, Université de Montpellier, Montpellier, France
 Armélio, Les Ulis, Courtabœuf, France
 LIMSI-CNRS, Orsay, France
 UPMC Univ Paris 06, Paris, France
The reduction of energy consumption in the building sector (nearly 40% of the energy consumption in Europe) is a real challenge to achieve the objective of the “2020 European climate and energy package”. In recent years, great interest is observed for the Stirling thermoacoustic machines. Nonlinearities due to the high level of acoustic pressure generate DC flows that are superimposed on the ...
I. Neitzel , R. Kreczkiuski ,
 FATEB, Telemaco Borba, Paraná, Brasil
A obtenção de polpa celulósica antecede a produção de papel e envolve a separação das fibras da madeira mediante a utilização de energia mecânica, térmica, química ou a combinação desses processos. Esta operação é realizada em um reator, tubular, cilíndrico e vertical (tipicamente 6 m de diâmetro e 50 m de altura), denominado genericamente de digestor. A madeira é alimentada pelo topo na forma ...
A. B. Atrah 
 Universiti Kebangsaan Malaysia, Malaysia
Fluid flow has the potential to provide significant mechanical energy input for electromagnetic energy harvesters. The effect of a bluff body, such as cylinder played a significant role in the creation of a Karman vortex profile in the fluid flow. We study the effect of the number and position of the Duffy cylinder on the characteristic of the aerodynamic system of the elastic belt such as the ...
J. Dsa, Manisha, M. Goswami , B.R Singh ,
 Indian Institute of information technology Allahabad, Allahabad, Uttar Pradesh, India
We have developed a piezoelectrically controlled MEMS drug delivery device for on-demand release of defined quantities of drug. A drug-loaded micro reservoir (∅6mm×550µm) is sealed by A membrane placed over the drug reservoir on which the piezoelectric material is deposited. On application of voltage across this piezoelectric material , the membrane deflects allowing the fluid to fill into the ...
M. Asgarisabet [1,2], R. Czapla , J. Krueger , B. Sterling ,
 Michigan Technological University, Houghton, MI, USA
 HARMAN International, Detroit, MI, USA
A simulation of an electrodynamic planar loudspeaker (EDPL) has been developed in this study with the COMSOL Multiphysics® software. Using the simulated model, effect of different parts has been studied to improve the performance. The locations of the coil and magnets have been obtained using the magnetic flux density. Then, the sound pressure level and directivity index have been obtained.
利用 COMSOL Multiphysics® 软件中流体传热接口、层流接口、化学反应接口对 HVPE 法单晶生长过程进行模拟。建立了基于 HVPE 生长室内部结构的简单二维模型，并进行了标准的网格剖分，通过物理场耦合，并添加了生长过程中所需的生长气氛，研究了 HVPE 法进行 GaN 单晶生长过程中衬底表面厚度分布的变化规律。通过模拟结果发现，衬底表面存在显著的边缘效应，边缘处厚度显著高于衬底表面其它区域。
M. M. Ghulam , E. J. Gutmark ,
 Aerospace Department, University of Cincinnati, Cincinnati, OH, USA
COMSOL analysis of the acoustic modes of two different Combustion Wind Tunnel Facility’s test sections was conducted in this project. The test sections are rectangular ducts, therefore the mathematical expressions to predict the longitudinal and transverse modes inside a tube were used and compared with COMSOL simulations. Three different cases with different boundary conditions were simulated ...
J. S. Crompton , L. Gritter , K. Koppenhoefer ,
 AltaSim Technologies, Columbus, OH, USA
Small-scale plasma jets in atmospheric air can produce regions of highly reactive chemistry coincident with temperatures approaching room temperature allowing his type of cold plasma jet to be used for decontamination of surfaces and sterilization of living tissue. In the device under consideration in this work, atmospheric pressure air is forced through a hollow anode and cathode. Immediately ...