V. S. Negi, H. Garg, B. Singh ,
 Central Scientific Instruments Organisation, Chandigarh, India
 Chandigarh College of Engineering and Technology, Chandigarh, India
Adaptive optics control using liquid filled membrane lens is based on the principle of deflection of polymeric membrane. Controlled deflection in membrane leads to controlled focal length. This enhances the focus tuning ability of the system at the same time make optical system compact and economical. The adjustment of fluid pressure helps to toggle between different field of view at the same ...
Thermal and Electrostatic Analyses of One Dimensional CFC Diagnostic Calorimeter for SPIDER Beam Characterisation
M. De Muri, M. Dalla Palma, P. Veltri, A. Rizzolo, N. Pomaro, and G. Serianni
Consorzio RFX, Euratom-ENEA Association, Padova, Italy
Dipartimento di Ingegneria Elettrica, Padova University, Padova, Italy
The main purpose of SPIDER (Source for the Production of Ions of Deuterium Extracted from RF plasma) test facility is the investigation and optimization of a negative ion beam produced by the full size ion source for ITER NBIs (Neutral Beam Injectors). Thermal, transient, non-linear FE (Finite Element) analyses and also electrostatic analysis have been performed as a feasibility study, to ...
M. Yang, A. Young, and B. Crittenden
Department of Chemical Engineering University of Bath, Bath, United Kingdom
A small batch stirred cell which is operated at temperatures up to 400 °C and pressures up to 30 bar is used to study fouling behaviors of selected crude oils. COMSOL Multiphysics package is used for the CFD (Computational Fluid Dynamics) and heat transfer modeling for this stirred cell system. The simulation results are validated against the measured temperature data at various axial ...
A-S. Moreau, H. Lissek, and R. Boulandet
EPFL-STI-IEL-LEMA, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
In this paper, the underlying concept of electroacoustic absorbers is studied with the help of Comsol Multiphysics® Acoustics Module. Among the different ways to obtain variable acoustic properties on an electroacoustic transducer's voicing face, there is the shunting of the transducer's electrical input. With such shunt devices, the acoustic impedance that the transducer's membrane presents ...
L. Moro, F. Lugli, and F. Zerbetto
Department of Chemistry “G. Ciamician”, Università di Bologna, Bologna, Italy
Rotaxanes are a class of molecules recently developed in laboratory that have been heralded as possible molecular motors. The motor is constituted by a linear molecule (thread) and a ring-shaped molecule (macrocycle), which is free to move along the thread, switching between two, or more, energetically stable interaction points (stations). Molecular motors start their functioning far from ...
K. Shahim, J-M. Drezet, J-F. Molinari, S. Momjian, and R. Sinkus
LSMX, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
LSMS, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
University Hospitals of Geneva and University of Geneva, Switzerland
Waves and Acoustics Laboratory, ESPCI, Paris, France
A numerical finite element model of one human brain is built in COMSOL in order to study a particular form of hydrocephalus, the so called Normal Pressure Hydrocephalus (NPH). The geometry of the ventricles and the skull is obtained by Magnetic Resonance Imaging (MRI) and imported in COMSOL Multiphysics. Form the mechanical point of view, the brain parenchyma is modeled as a porous medium fully ...
A. Schwen, G. Bodner, A. Schnepf, D. Leitner, G. Kammerer, and W. Loiskandl
Institute of Hydraulics and Rural Water Management, Univ. Natural Resour. Appl. Life Sci., BOKU, Wien, Austria
Institute of Agronomy and Plant Breeding, Univ. Natural Resour. Appl. Life Sci., BOKU, Wien, Austria
Institute of Soil Science, Univ. Natural Resour. Appl. Life Sci., BOKU, Wien, Austria
Modeling soil water dynamics requires an accurate description of soil hydraulic properties, i.e. the retention and hydraulic conductivity functions. Generally, these functions are assumed to be unchanged over time in most simulation studies. In this paper, we implemented temporal changes in the soil hydraulic properties in a Richards’ equation simulation of soil water dynamics. Based on ...
R. Dufour , C. Wu, F. Bendriaa, V. Thomy, and V. Senez
BioMEMS Group, IEMN, University of Lille Nord de France, Villeneuve d’Ascq, France
This paper presents an Analog to Digital Microfluidic Converter (ADMC) using passive valves and enabling the conversion of a continuous liquid flow into droplets for Electro-Wetting On Dielectric (EWOD) actuation. Valves calibration, geometry characteristics and losses reduction have been optimized using microfluidic application mode of COMSOL Multiphysics®.
M. Williams, J. Zito, J. Agashe, A. Sopeju, and D. Arnold
University of Florida, Gainesville, USA
This paper describes the design of a normally closed, electrodynamic microvalve. Magnetic forces between a permanent magnet in the valve cover and a soft magnet in the valve seat hold the valve closed. The combination of electrodynamic actuation and a mechanical restoring spring are used to open the valve. A device model and a design optimization strategy using COMSOL ...
H. Schellen, A. van Schijndel, and P. Briggen
Eindhoven University of Technology, Eindhoven, Netherlands
Hunting Lodge St. Hubertus is one of the most prominent Dutch buildings from the early twentieth century. An extensive study of wind and wind-driven rain (WDR) was conducted to provide insight into the moisture load of the building facade, using measurements and CFD simulations. COMSOL Multiphysics was also used for modeling the moisture transport through the walls of the tower. The model ...