B. D. Hauer, C. Doolin, K. S. D. Beach, J. P. Davis
University of Alberta, Edmonton, AB, Canada
Over the past few decades, nano/micro-mechanical resonators have experienced tremendous improvements in measurement sensitivity, achieving sub-attometer displacement transduction , yoctogram mass resolution , and force measurements on the order of attonewtons . In order to ensure this level of accuracy, it is crucial that each nano/micro-mechanical device is properly calibrated. As ...
Inverse Model for Solving Partial Differential Equations Using a Stochastic Method and COMSOL Multiphysics®
E. Khosrowshahli, A. Jeremic
McMaster University, Hamilton, ON, Canada
Partial differential equations (PDEs) govern many phenomena in nature. Solving optimization problems which comprises the solution of large number of PDEs, is expensive concerning time and memory. Therefore, to reduce the solution cost, original problem is transformed to a corresponding stochastic optimization problem, which can be solved using optimization algorithms for stochastic problems. ...
C. Romero, M. Mujeeb-U-Rahman
California Institute of Technology, Pasadena, CA, USA
Implantable biosensors have the potential to revolutionize the healthcare industry by allowing patients and their health care providers to continuously monitor blood pH levels, pCO2, proteins, metabolites, and a wide variety of other biomolecules. These devices need to operate completely wirelessly to be used for long term monitoring. Metal coils are attractive candidates for wireless power ...
J. Brcka, S. Gandhi, R. Joe
TEL U.S. Holdings, Inc., U.S. Technology Development Center, Austin, TX, USA
The plasma reactor with radial line slot antenna (RLSATM), a planar microwave (2.45 GHz) plasma source, is used in etch and deposition technology, typically in reactive rich gaseous environment, and for processes that are sensitive to plasma damage. Besides a strict uniformity control, the plasma chemistry is becoming one of the key challenges in current technology. These two aspects are ...
K. A. Bodnyk, G. J. Noble, N. Fitzpatrick, M. J. Allen, K. Stephenoff, R. T. Hart
Department of Biomedical Engineering, The Ohio State University, Columbus, OH, USA
Fitzpatrick Referrals, Godalming, Surrey, United Kingdom
Department of Veterinary Medicine, The Ohio State University, Columbus, OH, USA
Introduction: The elbow joint in dogs constitutes a complex interaction of three bones, the humerus, radius and ulna. The primary articulation involves flexion of the forearm where the elbow acts as a hinge joint, with the humeral condyle seated in an arc formed by the ulnar trochlear notch and the radial head. A secondary articulation comes from rotation of the forearm when it acts as a pivot. ...
Studying the Sensitivity of the Wrinkling Process to Mesh Imperfections Using COMSOL Multiphysics® and LiveLink™ for MATLAB®
S. K. Saha, M. L. Culpepper
Massachusetts Institute of Technology, Cambridge, MA, USA
Introduction: Wrinkles are formed on a thin film as a result of buckling-based instabilities and the mechanism is similar to Euler buckling of beams under compressive loads (Figure 1). Wrinkling of thin films can be used as an inexpensive fabrication technique for generating micro and nano scale periodic patterns. In the absence of analytical models, finite element techniques are used for ...
Evaluation of Performance of Enzymatic Biofuel Cells with Microelectrode Arrays Inside a Blood Artery via Finite Element Approach
C. Wang, Y. Song
Florida International University, Miami, FL, USA
Enzymatic biofuel cells (EBFCs) are considered as a promising candidate for powering miniature implantable devices. In order to predict the performance in the human blood artery, we simulated a 3D EBFC chip with highly dense micro-electrode arrays. In this simulation using COMSOL Multiphysics®, we applied the 1) Michaelis Menten equation; 2) Nernst potential equation; 3) Navier Strokes velocity, ...
M. Dong, M. Tomes, M. Eichenfield, M. Jarrahi, T. Carmon
University of Michigan, Ann Arbor, MI, USA
Sandia National Laboratories, Albuquerque, NM, USA
We present a 3D port sweep method in a lossy silicon photonic crystal resonator to demonstrate the capabilities of COMSOL Multiphysics® for frequency domain analysis with input and output ports. This method benefits from the advantages of the S-parameter analysis to characterize the input and output coupling into the resonator. By pumping one end of the cavity with a CW plane wave, we are able ...
Modeling and Simulation of High Permittivity Core-Shell Ferroelectric Polymers for Energy Storage Solutions
N. Badi, R. Mekala
University of Houston, Houston, TX, USA
The dielectric properties of ferroelectric PVDF polymer embedded core-shell (Al-Al2o3) nanoparticle is simulated using COMSOL Multiphysics® software. Significant increase in electrical permittivity of the composite at percolation threshold (K = 2800) is achieved when compared to electrical permittivity of bare polymer (K = 12). Both Maxwell Garnett and Symmetric Bruggeman models gave an ...
X. Gong, R. Wan
University of Calgary, Calgary, AB, Canada
THM (Thermo-Hydro-Mechanical) behavior of the reservoir during SAGD (Steam-Assistant-Gravity-Drainage) was studied through a proper constitutive modeling of the porous media. Specifically, a generalized density-stress-fabric dependent elasto-plastic model with stress-dilatancy and plastic damage as main ingredients was implemented into COMSOL Multiphysics®, to model geomechanical behavior during ...