This is the first video in a 3part demo on multiphysics modeling of resistive heating in an aluminum fuse. Overview of simulating joule heating with comsol software. Upon adding joule heating and thermal expansion to a model, notice that several physics nodes have also been added to the model tree. Model and application of a shellandtube heat exchanger built using the. The joule heating multiphysics interface couples the heat transfer in solids interface with electric currents acdc module. The joule heating and thermal expansion multiphysics interface being added to a model component. I describe in my model a typical resistive heating by current passage at the contact of two surfaces axial symmetry 2d. The primary inputs are current, voltage, and the material resistivity.
The use of physics interfaces, couplings, and postprocessing functionality to study phenomena such as convective cooling, joule heating. Comsol application notes simulationdriven design of. Nonisothermal flow comsol multiphysics modeling software. In chapter 2, joule heating and thermoelectric heating in 1st harmonic and 2nd harmonic signals are analyzed by comparing the terms in governing equations and simulation results. In some cases, joule heating is pertinent to an electrical devices design, while in others, it is an unwanted effect. Joule heating, also known as resistive heating or ohmic heating, is one of the classic multiphysics couplings in science and engineering. Joule heating effects on particle immobilization in. At a microscopic level, joule heating is caused by interactions between the moving charged particles. In testing we used a pulsed laser along a range of peak powers. Joule heating is the generation of heat by passing an electric current through a metal. Convection, conduction, and joule heating can all be modeled when you have the electrodeposition module, which contains a specific physics interface for heat transfer through porous media.
Joule heating in a fuse on a circuit board tutorial, chapter 2. Joule heating in a fuse on a circuit board, chapter 2 comsol. Comsol software users who are onsubscription should submit their questions via the support center for a more comprehensive response from the technical support team. Geometry 1 import 1 imp1 1 on the home toolbar, click import. Also referred to as ohmic or resistive heating, joule heating commonly affects material properties, such as electrical conductivity. In the boundary conditions, ive associated a contact resistance to my contact pair the interface between my subdomains. One of the more common examples of a multiphysics coupling is joule heating, where the flow of electrical current through a conductive material leads to heat losses which lead to a rise in temperature. Model and application of a shellandtube heat exchanger built using the dedicated multiphysics node for nonisothermal flow. Nov 12, 2014 comsol has released comsol multiphysics software version 5. Joule heating, also known as ohmic heating and resistive heating, is the process by which the passage of an electric current through a conductor produces heat joules first law, also known as the joulelenz law, states that the power of heating generated by an electrical conductor is proportional to the product of its resistance and the square of the current.
In this second chapter of a 3part demo you will learn how to. Joule heating is a synonym for resistive heating or ohmic heating. Joule heating simulations tutorial comsol multiphysics. The heat transfer module can be used to analyze the effects of joule heating, inductive heating, and microwave heating effects. This problem is a system of two coupled partial differential equations on the. To find these files, start the model navigator, click the model library tab and then look under the chapter headings. The comsol discussion forum covers a wide variety of simulation topics. Joule heating coupled with heat transfer of solids of comsol multiphysics software is used to simulate the working principle of the sensor. Chapter 1 introduces various techniques to obtain nanoscale temperature distribution. To assess the effect of joule heating on particle immobilization, the regions of particle trapping as denoted by eqn. Joules law describes joule heating or ohmic heating or resistive heating. To prevent the components and devices from overheating, engineers can incorporate convection cooling into the design.
Video tutorial on how to model joule heating in comsol. Examples include stovetop burner elements and space heaters. I want to model temperature dependent response of a viscoelastic polymer. Joule heating setup two boundary conditions are available to define a joule. The difference between heat and temperature can be a difficult concept to grasp. At low conductivity, velocity flow does follow v4 whereas at higher conductivities where joule heating is more significant the flows velocities tend to fit v5. The current conducted in the busbar, from bolt 1 to bolts 2a and 2b, produces heat due to the resistive losses, a phenomenon referred to as joule heating. Joule heating in a fuse on a circuit board, chapter 1 comsol. Heat transfer rate with electric current using comsol 4. The predefined interfaces include joule heating, induction heating, microwave heating, and laser heating. The possible multiphysics phenomena include thermal contact, nonisothermal turbulent flow, heat transfer in porous media, joule heating, microwave heating, and laser heating. Joule heating effect multiphysics in integrated circuit.
Follow the series to see the setup and solution of a multiphysics model of joule heating and thermal expansion in a thermoelectromechanical mems actuator. Introducing heat transfer modeling software from comsol. In addition to conventional physicsbased user interfaces, comsol multiphysics also allows entering coupled systems of partial differential equations pdes. Joule heating, also called as ohmic heating, is a promising technology for cooking. Finite element modeling of the hot disc method sciencedirect. The heating of these structures can cause them to degenerate or even melt. Browse the threads and share your ideas with the comsol community. Joule heating and thermal expansion requires the structural mechanics module or mems module thermoelectric effect requires the heat transfer module dedicated multiphysics nodes. Joulethomson effect definition comsol multiphysics.
Also known as resistance heating, this function simulates heating due to electrical resistance. Conclusions results of numerical simulations are presented and compared with experiments. I am trying to simulate a joule heating experiment where a potential difference to applied across two electrodes causing the water and the cube within the vessel to heat up, please see image attached. Oct 31, 2014 examples of nonisothermal flow light bulb. To help the learning process, there is a streamlined workflow you can follow that is reflected throughout the user interface of comsol multiphysics. Familiar examples are heating of conductors in electronics, power lines, fuses, and electric heaters. How to set up and run a simulation with comsol multiphysics. You can simulate the effect of joule heating using comsol multiphysics for a variety of electrical applications. Additionally, if the fluid is dielectric, polarization will happen in the presence of an electric field causing fluid flow.
Then youd like to heat the system by joule heating. Simulating joule heating cfd applications for microfluidic. Below is an example of mechanical stress induced in a heating circuit by way of joule heating. In this second chapter of a 3part demo you will learn how to add physics and. Comsol multiphysics is a finite element analysis, solver and simulation software package for various physics and engineering applications. The module adds contributions from electrochemical processes to the heat balance. The joule heating effect software di simulazione comsol.
A couple of applications that do rely on joule heating include hot plates directly and microvalves for fluid control indirectly, through thermal expansion. We use the same notations as in comsol multiphysics. In other applications including bus bars and highpower printed circuit boards joule heating is an inevitable side effect that must be predicted and managed if the product is to perform reliably. The governing equations are solved numerically by using comsol multiphysics. The melting of the conductor is useful in fuses and is the basis of the industrially important process of electrical welding. Multiphysics modeling of resistive heating in an aluminum fuse on a circuit board. Comsol simulation results red are compared to experimental values cross. The heating and melting of such conductors are usually undesirable side effects, but in electrical heaters the heating is welcome. Joule heating effects on particle immobilization in insulator.
Comsol multiphy sics simulation software version 5. Performing a multiphysics analysis of a thermal microactuator. Known as the joulethomson effect or sometimes the thomsonjoule effect, this phenomenon has proven to be important in the advancement of refrigeration systems as well as liquefiers, air conditioners, and heat pumps. Watch to learn how you can easily set up and solve a joule heating simulation using comsol software. It is also the effect that is responsible for a tire valve getting cold when you let out the air from a bicycle tire. Aug 24, 2010 hi there comsol users my issue is straightforward. Heat transfer module users guide comes with the software as a loadable comsol multiphysics model mphfile with the extension. Comsol has released comsol multiphysics software version 5. Multiphysics modeling of resistive heating in an aluminum fuse. Tutorial model of a heating circuit comsol multiphysics. These multiphysics simulation capabilities are useful in the design and study of underground cables, fuses, inductors, and a wide variety of additional applications.
Any device that uses electrical power experiences energy loss to heat. Some applications such as fuses, floor heaters, heat lamps, and window defrosters rely on joule heating for their operation. The application builder allows engineers to make available an easytouse application based on their comsol multiphysics model. How do i make a nonlinear solver converge in comsol multiphysics. For new users of comsol multiphysics simulation software, a proper introduction on how to set up and run a model is essential when learning how to use the software. Find out how to add physics and solve the model in comsol. The cold arm anchor and all other surfaces are electrically insulated. To demonstrate the use of the workflow in the tutorial, we simulate joule heating and thermal expansion of a twohotarm thermal actuator made of polysilicon.
Several addon products are available for comsol multiphysics, including heat transfer module for. Reasonable result can be obtained when using stationary solver. Joule heating comsol multiphysics modeling software. Jules heating law, resistive heating, ohmic heating explained. By combining the heat transfer module with other addons from the comsol product suite, you can create advanced heat transfer simulations. How to convert joule heat to temperature, any hint. Boundary conditions an electric potential is applied between the bases of the hot arms anchors. Joule heating occurs when an electric current passes through a conducting material, such as a fluid.
Figures 3b and 3c represents the trapping zones obtained when 1,500 v are applied for 30 s same conditions as fig. Modeling joule heating in a thermal microactuator with the comsol software the example consists of a substrate and a microactuator. As the gas in the vicinity of the filament becomes hotter, its density becomes relatively lower than the rest of the. In these tutorials, linus andersson from the global technical support team here at comsol will show you how to couple the direct current electrical current in a fuse on a circuit board to the heat transfer in it and the surrounding system. I am trying to simulate a joule heating experiment where a potential difference to applied across two electrodes causing the. Additionally, if the fluid is dielectric, polarization will happen in the. Joule heating is a classic multiphysics coupling in engineering and science. Select and add the joule heating and thermal expansion interface to the model component.
Comsol multiphysics software and its addon products for analyzing heat transfer and multiphysics behavior in devices are described as they are used across the case studies under consideration. Im hoping someone is able to advise me as i am a beginner in using the software. The application builder allows engineers to make available an easytouse application. A few examples of where this occurs includes conductors in fuses, electronics, power lines, and electric heaters. The device in this tutorial example consists of an electrically resistive layer deposited on a glass plate. A noble gas, such as argon, is often used within light bulbs to convect heat away from the tungsten wire and prevent it from burning up from the joule heating effect it is subjected to. Essentially, heat is the total amount of kinetic energy the molecules of a substance have, and is measured in units.
Known as the joule thomson effect or sometimes the thomson joule effect, this phenomenon has proven to be important in the advancement of refrigeration systems as well as liquefiers, air conditioners, and heat pumps. In the boundary conditions, ive associated a contact resistance to my contact pair the interface between my. The what, why and how of simulating joule heating mdx. It considers heating due to conduction currents and dielectric loss. The layer results in joule heating when a voltage is. An example of such a coupling is given in the introduction to comsol multiphysics booklet. A primary physical phenomena causing this is known as joule or ohmic or resistive heating, and it can be either advantageous or detrimental for a given system. Multiphysics interface for joule heating in composite materials. Note that while comsol employees may participate in the discussion forum, comsol software users who are onsubscription should submit their questions via the support center for a more comprehensive response from the technical support team. In this, i am explaining joule heating effect simulation by using comsol multiphysics software.
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