S. Chaudhuri , W. Du ,
 University of Illinois at Urbana-Champaign, Champaign, IL, USA
Predicting and controlling the formation of droplets from a liquid jet is a critical problem in a variety of applications ranging from fuel injection to paint sprays. It is known that liquid droplets subjected to an electric field acquire a net electrostatic charge via induction, and that the magnitude of this charge depends on the conductivity of the liquid and the size of the droplet . When ...
B. Mizaikoff, X. Wang, and S.-S. Kim
Institut für Analytische und Bioanalytische Chemie
Evanescent-wave optical waveguide is widely used as sensing platform for chemical/biological sensor applications. Our research group contributed to on-chip IR sensor technology and made recent progress in miniaturizing such devices utilizing quantum cascade lasers (QCL) in combination with planar GaAs/Al0.2Ga0.8As waveguides. Furthermore progress is reported toward microfabricated Mid-infrared ...
P. Lamy-Bracq and C. Coulouarn
Nexter Munitions, Tarbes, France
A solidification process of casting explosives in shell is studied in this paper. An enthalpy method approach is used to model the solidification process. Both the thermal and mechanical effects are taken into account. An ALE (Arbitrary Lagrangian-Eulerian) method is used to represent the physical deformation due to solidification. Results from the model are verified against experimental ...
Deformation of Drop-within-Drop System under the Influence of High Intensity Oscillating Electric Field
D. Das, R.S. Patil, S. Kulkarni, V.A. Juvekar, and R. Bhattacharya
IIT Bombay, Mumbai, Maharashtra, India
India Atomic Energy Regulatory Board, Mumbai, Maharashtra, India
This paper deals with the simulation study using COMSOL on the deformation of drop-within-drop system in a high intensity oscillating electric field. It consists of a composite drop suspended in a continuous phase. This composite drop has a smaller inner drop suspended within the larger outer drop. The outer drop is made up of another immiscible liquid. A high intensity sinusoidally varying ...
Toyota Research Institute of North America, Ann Arbor, MI, USA
Multiphysics optimization of thermal-fluid systems is an emerging area of interest with application to the development of high performance cooling technologies for electronic systems. This paper builds on previous work focused on the development of a computational platform for numerical optimization. Specifically, a sample optimized topology is briefly described, and the final result is ...
S. Maloney[1,2], Y. Li[1,2], G. Auner, and J. Smolinski
Wayne State University, Detroit, MI, USA
Lawrence Technological University, Southfield, MI, USA
We are working on a microfabricated lysing chip that uses a piezoelectric actuator to provide ultrasonic energy to break apart cells. The device contains pillars with varying dimensions. We hypothesize that increasing the aspect ratio of pillars will increase the efficiency of the transfer of ultrasonic energy into the fluid phase and enhance the lysing efficiency. The fluid structure ...
A.Torrents, N. Godino, F.J. del Campo, F.X. Muñoz, and J. Mas
Universitat Autònoma de Barcelona, Spain
Microbia Fuel Cells (MFC’s) are complex environments where electrochemical, physical and biological aspects must be considered together. In this work we present a 1D model partially describing a Shewanella oneidensis MFC that degrade sodium lactate [lactate -> Acetate + CO2 + 2H+ + 2e-]. The model, simulated using COMSOL, focuses on pH implications of the MFC operation. Release of protons during ...
A. J. Kovacs, and M. Nemenyi
University of West Hungary
Institute of Biosystems Engineering
Our Institute at the West Hungarian University is dealing with modelling of heat physical treatments in agricultural (biological) materials. The essential key in order to gain accurate results is to know the driving forces during heat and mass transfers. In case of mass transfer processes the application of moisture gradient as driving force gives false results. Therefore, we use water ...
S.F. Neves, J.J.B.L.M. Campos, T.S. Mayor
CEFT – Transport Phenomena Research Center, Chemical Engineering Department, Porto University, Porto, Portugal
CeNTI - Centre for Nanotechology and Smart Materials, Rua Fernando Mesquita, Vila Nova de Famalicão, Portugal
A clothing system should offer the user a period of relatively comfort. However, changes in the ambient conditions over day affect the heat and mass transport in the system, influencing the user comfort perception. In order to gather information to allow the optimization of clothing systems, it is essential to understand the heat and moisture transfer occurring across multi-layer textiles. For ...
R.V. Iyer, Vinay K., A. R. Kamath, A. Goswami, A. Sharma, A. V. Joshi, A. Mishra, N. S. Pai, S. Chakraborty, Rakesh D.
PES Institute of Technology, Bangalore, Karnataka, India
This abstract addresses the effect of scaling in air gap MOSFETs and determination of functional relationship between scaling parameter and sensitivity, frequency response. The modelling of the MOSFET and its simulations has been carried out using COMSOL Multiphysics. An air Gap MOSFET in its simplest form can be imagined to be one obtained by replacing the dielectric in a MOSFET with air. The ...