Comsol lep tutorial for tank flow system two cstr in series. A more detailed description of the phenomenon and the modeling process can be seen in the blog post designing new structures with shape optimization. Absorptive muffler shells v52a 4 3 free download as powerpoint presentation. Use of comsol simulation for undergraduate fluid dynamics. Expanding multiphysics applications with comsolversion 4. A sensitivity study was conducted to study the performance dependency of heat pipe on four parameters namely, porosity, condenser evaporator lengths, radius of heat pipe and the heat input, in terms of the absolute thermal resistance. We also create a comsol model of a balanced armature receiver, which is a typical loudspeaker used for inear headphones, hearing instru. After a general introduction to the user interface, several tutorials will take you step by step through sample models that highlight important features. This example app is based on a model in comsol multiphysics of an absorptive muffler. Comsol multiphysics graphical user interface, please refer to the comsol multiphysics users guide or the comsol multiphysics quick start manual. Tutorial for running comsol files from comsol website.
Effects of duct geometry, thickness and types of liners on. Setting the fixed constraint at the four edges of the diaphragm. Absorptive muffler with shells comsol multiphysics. With the app, you can perform an analysis of both inductive and resistive damping in a muffler of your choosing. This will open up comsol library where you see many comsol files to solve chemical reaction engineering problems. Two friction stir welding models are presented a global thermal model using the temperature dependent heat source. Finite element analysis of acoustic pressure levels and. Comsol started in 1986 with agency products, markets only own products now. This stepbystep instructional video will guide you through the modeling workflow, with an emphasis on structural mechanics modeling. A typical automotive exhaust system is a hybrid construction consisting of a combination of reflective and dissipative muffler elements. Comsol multiphysics true multiphysics everything can link to everything flexible you can model just about anything. The cooling capacity of the heat sink can be determined by monitoring the temperature of the base surface of the heat sink.
Numerical simulation of a cylindrical heat pipe and. The equations that comsol solves are displayed in the equation section of the settings window. By the end you will be well on your way to reaping all. The sound level from a car depends to a great extent of the quality of the muffler. Learn how to use comsol multiphysics and the structural mechanics module by conducting a static analysis of a mechanical structure. Click on run in browser to start the application you will see that following window opens which has input parameters, description, graphical features and a few buttons. Comsol multiphysics tutorial absorptive muffler acoustics. Containing a model tree, the model builder outlines the structure of your model.
An introduction to shape optimization tutorial model. Methodology to measure the heat pipe performance it is very important to. Capacitive sensor design using comsol provides the user with a wide variety of tools. When the rigid duct of an expansion chamber has been lined by a packed absorptive material under a perforated membrane, incident sound waves will be dissipated by the absorptive liners. The detailed design procedures for mufflers and absorbent materials are.
A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Sound attenuation in absorptive silencers has been analyzed in this paper. This model describes the pressure wave propagation in a muffler for an internal combustion engine. To solve three heat transfer problems with theoretical method and comsol model method 4. The user may change the geometric design of the muffler, the ambient temperature and. Comsol multiphysics is a generalpurpose simulation software for modeling designs, devices, and processes in all fields of engineering, manufacturing, and scientific research. Click on comsol access present at the bottom of the page. The purpose of the model is to show how to analyze both inductive and resistive damping in pressure acoustics as well as coupling the fluid to the surrounding elastic shell structure of the muffler. Right click on the solid mechanics node and select fixed constraint. The model solves a thermal balance for the heat sink and the air flowing in the rectangular channel. To simulate the heat transfer processes between room and a radiator by using comsol multiphysics software. What is the best way to start with comsol multiphysics.
Comsol is the developer of comsol multiphysics software, an interactive environment for modeling and simulating scientific and engineering problems. The absorptive muffler designer simulation app is used for studying and designing a simple resonant muffler with a porous lining. Over the years, researchers in the car industry have struggled to produce mufflers that are efficient from both an acoustic and an environmental perspective. The informative charts give you an idea of comsols capability by associated files, functions, and builtin options. How to model structural mechanics in comsol multiphysics. The equations change based on the equation form selected. Rather, than reading books on comsol, i suggest please start using comsol because when you will start, you will find many errors, may be physics. Thermal and material flow modelling of friction stir welding using comsol henrik b. The reflective parts are normally tuned to remove dominating lowfrequency engine harmonics, while the dissipative parts are designed to take care of higherfrequency noise. Hattel 1technical university of denmark, 2hbs engineering. Fem, reactive muffler, absorptive muffler, transmission loss, glass wool 1 introduction in this paper, we will examine two cases of reactive and dissipative muffler, using fem finite element method. Uh innovation centre college lane hatfield hertfordshire al10 9ab. The comsol desktop 7 the comsol desktop the user interface streamlines the modeling workflow with the model builder.
This example exemplifies the basics in how to optimize shapes using comsol multiphysics. Thermal and material flow modelling of friction stir welding. To access any comsol files, you need to have a comsol account which can be created for free. The comsol multiphysics direct solvers have been multicore and clusterenabled for several years. With comsol, it is also possible to observe the effects of temperature on the capacitance value. Absorptive muffler designer app comsol multiphysics. Comsols thermoacoustics interface, included in the acoustics module. This tutorial shows how to couple three physics interfaces to model evaporative cooling. Warning your internet explorer is in compatibility mode and may not be displaying the website correctly. Jun 17, 2015 acoustics pressure analysis with comsol software. Singlephase flow creeping flowstokes flow laminar flow newtonian and nonnewtonian flow turbulent flow. Evaluation of comsol multiphysics for modelling of. In this paper, we present the theory of thermoacoustics that is necessary for viscothermal modeling of miniature loudspeakers. The wet surface feature is used to implement the source term for the water vapor and to.
The reflective parts are normally tuned to remove dominating lowfrequency engine harmonics, while the dissipative parts are. Supported platforms are linux and windows hpc server. To compute how much heat energy has been transferred from radiator. The detailed design procedures for mufflers and absorbent materials are available in the literature 2, 3, 7 and 8. Broers building 21 j j thomson avenue cambridge cb3 0fa. An explanation of how to model with a programming language is available in yet another book, the comsol multiphysics scripting guide. The combination of comsol products required to model your application depends on several factors and may include boundary conditions, material properties, physics interfaces, and part libraries. Use of comsol simulation for undergraduate fluid dynamics course dr. The effects that need to be taken into account are heat transfer, transport of water vapor, and fluid flow. Particular functionality may be common to several products. The user can simulate a design, test for the capacitance and observe the effects on capacitance by changing parameters such as dielectric permittivity of materials. Use of comsol simulation for undergraduate fluid dynamics course. Absorptive muffler shells v52a 4 3 normal mode acoustics. To provide a general introduction to comsol multiphysics software 3.
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