Salvi, D Boldor, Dorin Ortego, J Aita, G M Sabliov, C M Numerical modeling of continuous flow microwave heating: a critical comparison of COMSOL and ANSYS. Therefore, this modeling tool can be used with confidence to supplement the current suite of acoustic propagation codes, and ultimately develop new acoustic engine liners designed to reduce aircraft noise. The results demonstrate that both conventional perforate-over-honeycomb and extended-reaction liners can be accurately modeled using COMSOL. While this report only includes comparisons for a subset of the configurations, the full database of all measurements and predictions is available in electronic format upon request. These measurements were then compared with predictions. The liners were exposed to high sound pressure levels and grazing flow, and the effect of the liner on the sound field in the flow duct was measured. To achieve these goals, a variety of liner samples, ranging from conventional perforate-over-honeycomb to extended-reaction designs, were installed in one wall of the grazing flow impedance tube at the NASA Langley Research Center. The purpose of this study is to determine if a commercially-available finite element package, COMSOL Multiphysics, can be used to accurately model a range of different acoustic engine liner designs, and in the process, collect and document a benchmark dataset that can be used in both current and future code evaluation activities. Bertolucci, BrandonĪccurate modeling tools are needed to design new engine liners capable of reducing aircraft noise. It can be concluded from the results of potential distribution and transmembrane voltage, it show that pores formation only occurs in the membrane cells and it could not penetrate into inside the model cell so there is not pores formation in its organells.Įxperimental Evaluation of Acoustic Engine Liner Models Developed with COMSOL Multiphysics Modeling of electroporation phenomenon on a model cell had been done by using software COMSOL Multiphysics 4.3b with the applied external electric field with intensity at 1.1 kV/cm to find transmembrane voltage and pore density. The purpose of creating pores in the cell using conventional electroporation are to increase the effectiveness of chemotherapy (electrochemotherapy) and to kill cancer tissue using irreversible electroporation. Modelling in conventional electroporation for model cell with organelles using COMSOL MultiphysicsĬonventional electroporation is a formation of pores in the membrane cell due to the external electric field applied to the cell. The paper will introduce using of the LiveLink for COMSOL for chosen case studies in the field of technical cybernetics and bioengineering. The cooperation with MATLAB via LiveLink enhances a powerful computational environment with complex multiphysics simulations. Once the minimum is found, it returns exit flag, terminates optimization and returns the optimized values of the parameters. Once the task is launches, the COMSOL model is being called in the iteration loop (from MATLAB environment by use of API interface), changing defined optimization parameters so that the objective function is minimized, using fmincon function to find a local or global minimum of constrained linear or nonlinear multivariable function. At first, the head script launches COMSOL with MATLAB and defines initial value of all parameters, refers to the objective function J described in the objective function and creates and runs the defined optimization task. It allows user to utilize the full power of MATLAB and its toolboxes in preprocessing, model manipulation, and post processing. LiveLink for COMSOL is a tool that integrates COMSOL Multiphysics with MATLAB to extend one's modeling with scripting programming in the MATLAB environment. Ozana, Stepan Pies, Martin Docekal, Tomas The idea behind this goal is to introduce air diffusers with a special geometry allowing improving mixing between the hot or the cold conditioned air introduced in the cockpit and the ambient.Ĭase studies on optimization problems in MATLAB and COMSOL multiphysics by means of the livelink The objective will be the implementing innovative air diffusion grilles in a prototype vehicle. The aim of this paper is to modeling and simulating the thermal comfort inside the vehicles, using COMSOL Multiphysics program, for different ventilation grilles. The environmental quality in vehicles is a very important aspect of building design and evaluation of the influence of the thermal comfort inside the car for ensuring a safe trip. Modeling of the thermal comfort in vehicles using COMSOL multiphysics
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