Possibilities of Using COMSOL Software in Physics
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1 ALEKSANDRAS STULGINSKIS UNIVERSITY Possibilities of Using COMSOL Software in Physics Jolita Sakaliūnienė 1
2 Overview Requirement of study quality Student motivation COMSOL software Composition of COMSOL Multiphysics Examples Summary 2
3 Requirement of study quality 3
4 Student motivation Simulation is fast and delivers local and global information in details, for example the velocity field or pressure distribution in a pipe. Simulation provides approximate solution to real problems and also cheaper. Numerical modeling provides general knowledge and understanding for the mode of operation of products and processes 4
5 COMSOL software Multiphysics is the combination of several physics phenomena when describing a process In modeling and simulations, these descriptions are based on the laws of physics There is one precise way to present the laws of physics, and that is by means of differential equations Comsol facilitates all steps in the modeling begining with your geometry, specifying your physics ( subdomain and boundary conditions), meshing, solving and then visualizing your results. Comsol can solve problems in 1D, 2D, 3D and axial symmetries in 1 and 2D 5
6 Composition of COMSOL Multiphysics: 6
7 COMSOL software COMSOL Multiphysics software is a powerful finite element (FEM), partial differential equation (PDE) solution engine. The software has add-on modules that expand the capabilities in the following application areas: AC/DC Module (for computational electromagnetics modeling) Acoustics Module (for acoustics and vibrations analysis) Capacitors Inductors Insulators Coils Motors Sensors Resistance Capacitance Inductance Impedance Force Torque Devices that produce, measure and utilize acoustic waves Speakers Microphones Hearing aids Sonal devices 7
8 COMSOL software Chemical Engineering (for modeling mass and energy balances and chemical reactions) RF (for microwave and RF design) RF and microwave devices: antennas waveguides filters circuits cavities metamaterials Electromagnetic field distributions Transmission Reflection Impedance Power dissipation Chemical reactors Filtration equipment Mixers Material transport and heat transfer together with arbitrary chemical kinetics in all types of environment (gases, liquids, porous media etc.) Heat transfer (for general-purpose modeling of heat transfer in solids and fluids) Heating and cooling in devices, components, or processes Mechanisms of heat transfer: Conduction convection radiation In collaboration with other physics: Structural mechanics Fluid dynamics Electromagnetics Chemical reactions 8
9 COMSOL software MEMS (microelectromechanical systems) Structural Mechanics (for performing structural mechanics analyses) Mechanical structures that are subject to static or dynamic loads Analysis types: Stationary Transient Parametric Quasi-static Frequency-response Buckling Prestressed. The Multiphysics has CAD Import Module and the Material Library as supporting software 9
10 Multiphysics Icons 10
11 Examples Simulation of electrical heating in a busbar Busbar an electrical conductor, maintained at a specific voltage and capable of carrying a high current, usually used to make a common connection between several circuits in a system 11
12 Examples System modeling and multiphysics Circuit modeling, current density distribution, Joule heating, and circuit model Fluid flow, species transport, chemical reactions, and the conservation of energy Model of a battery charging circuit including a highfidelity analysis of the clamps and contact resistance. Includes current density distribution, Joule heating, and a model of the circuit. Model of a particle filter for diesel engines. The model includes porous media flow, energy balances in fluids and solids, multicomponent transport, and chemical reactions. 12
13 Examples Electromagnetic wave propagation and structural analysis Stress-optical effects After annealing at high temperatures, mismatch in thermal expansion between the silica and silicon layers results in thermally induced stresses at the operating temperature. These stresses influence the refractive index.
14 Examples Thermal stress in micro-sofc* structure: (a) with Si 3 N 4 sacrificial layer at C temperature; (b) with SiO 2 sacrificial layer at C temperature Thermal stress distribution map of micro-sofc membrane (Si 3 N 4 sacrificial layer) at 800º C temperature. *micro-sofc micro solid oxide fuel cells 14
15 Summary COMSOL Multiphysics software is a great tool to compute, visualize, explore, analyze and present obtained data for various types of settlement and study process. 15
16 Thank you for your attention 16
17 License Class Kit License (CKL) is often used for a teaching process. as many as 30 students can simultaneously use the software for a class over a school/university network. Two teaching assistants can also use it to prepare class mate Prices are available here: ber2012_academic.pdf 17
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