There are also many new functions and additions to the comsol product suite. Also known as resistance heating, this function simulates heating due to electrical resistance. Electromagnetics modeling in comsol multiphysics the acdc and rf modules. Joule heating in a fuse on a circuit board tutorial, chapter 2. This week, well go through a thermal actuator example which uses joule heating, thermal expansion multiphysics. In this model version, only the currents and temperatures are computed, while the deformation is ignored. This coefficient may be either positive corresponding to cooling or negative heating. Joules first law and heat transfer introduction in this experiment heat is produced by passing a current through a resistor which is immeresed in a container of water. Introducing heat transfer modeling software from comsol. The example consists of a substrate and a microactuator. The heat transfer module includes a comprehensive set of features for investigating thermal designs and effects of heat loads. Power companies transmit electricity at high voltages and low currents on power lines to minimize power losses despite higher risk.
Joule heating in a fuse on a circuit board, chapter 1 comsol. A couple of applications that do rely on joule heating include hot plates directly and microvalves for fluid control indirectly, through thermal expansion. Note that while comsol employees may participate in the discussion forum. As with all blogs, the best way to communicate the feature is to show it. Any help at all is greatly appreciated as i am still quite a novice comsol user. Chapter 1 in our 3part video series details how to build the model and add materials.
Honestly, it looks like how you are using joule heating is the proper way to use it. This problem is a system of two coupled partial differential equations on the. This example describes an array of heating tubes submerged in a vessel with fluid flow entering at the bottom. Now start comsol multiphysics using the matlab7 comsol icon followed by comsol. The pressure and the velocity field are the solution of the navierstokes equations. Also see physics interface guide by space 11 dimension and study type. Comsol conduction heat transfer example 39 heat loss from an. How meshing and computing problems in comsol can be solved in. My objective is to evaluate the joule heating effect on the ic pins due to the injection of electirc current pulse.
By combining the heat transfer module with other addons from the comsol product suite, you can create advanced heat transfer simulations. Using the geometry and electrical resistance of those components, flow simulation will calculate the heat generated by those parts. Figure 6 shows the acdc interfaces as well as those under the heat transfer branch, which contains the joule heating and induction heating interfaces. Jmags jsol solution was applied to the electromagnetic design to compute the joule heat loss. Comsol requires that every type of simulation included in the package has the ability to be combined with any other. Joule heating adds the ability to run power through electronic components. Despite the fact that it has units of power, it is commonly referred to as joule heat. Mar 08, 2019 lets take a look at a thermal microactuator model built using the comsol multiphysics software. In chapter 1 you will see how to build the model and add materials in comsol multiphysics. Img workshop introduction to python for research part 1 thursday, april 16, 2020 4. Joule heating of an alternate current comsol multiphysics.
Joule heating in a fuse on a circuit board, chapter 2 comsol. The layer results in joule heating when a voltage is applied to the circuit, which results in a structural deformation. Problem about joule heating and thermal expansion comsol. Electric power and joule heating as a charge moves from a to b, the change in electric potential energy is. Joule heating, also known as resistive heating or ohmic heating, is one of the classic multiphysics couplings in science and engineering. This allows a full range of joule heating capabilities to be simulated within the familiar abaqus environment. Joule heating is a synonym for resistive heating or ohmic heating. Veryst engineering specializes in multiphysics problems involving solids, fluids, heat transfer, mass transfer, acoustics, and electromagnetics.
The model also requires either the mems module or structural mechanics module. The predefined interfaces include joule heating, induction heating, microwave heating, and laser heating. Joule heating is the generation of heat by passing an electric current through a metal. The joule heating multiphysics interface couples the heat transfer in solids interface with electric currents acdc module. The thermalelectric multiphysics capability in abaqus provides a complete fullycoupled capability including nonlinear effects in material properties in both the electrical and thermal physics components. However, as explained below, you can easily modify it to simulate a twoway coupling between the electric current and the heating of the actuator. Choose 2d, comsol multiphysics, electrothermal interaction, and jouleheating, then ok. Comsol conduction heat transfer example 39 heat loss from. I have the joule heating physics and i have been able to successfuly simulate the temperature on the line with a direct current.
Chapter 1 introduces various techniques to obtain nanoscale temperature distribution. The application gallery features comsol multiphysics. The busbar electrical heating in a busbar in order to get acquainted with comsol multiphysics, it is best to work through a basic example step by step. Familiar examples are heating of conductors in electronics, power lines, fuses, and electric heaters. Certain characteristics of comsol become apparent with use. Video tutorial on how to model joule heating in comsol.
The comsol simulations drove ab initio product engineering and design. Jules heating law, resistive heating, ohmic heating explained. Accurate simulation of many products now requires a multiphysics approach. Dec 23, 2016 solving heat conduction example 39 of heat and mass transfer fundamentals and applications 8th edition using comsol. Joule heating in a surface mounted package classic knownheatsource thermal analysis power, current or voltage input can. Can someone explain with math how transmitting power at higher voltages reduces resistive loss. In some cases, joule heating is pertinent to an electrical devices design, while in others, it is an unwanted effect. 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. This is because the higher voltage used in europe 380 v vs 230 v. This simple tutorial model simulates the resistive heatingalso known as joule heating of a twohotarm thermal actuator. Joule heating in a fuse on a circuit board tutorial, chapter 1. The layer results in joule heating when a voltage is. For example, in the us a polemounted transformer in a suburban setting may supply houses, whereas in the uk a typical urban or suburban lowvoltage substation might be rated at 2 mw and supply a whole neighborhood.
Reasonable result can be obtained when using stationary solver. Our modeling and analysis expertise includes fluidstructure interaction, thermalstructure interaction, structuralacoustic vibrations, conjugate heat transfer, joule heating. Solving heat conduction example 39 of heat and mass transfer fundamentals and applications 8th edition using comsol. Hello, i am trying to simulate what happens to the temperature of a transmission line that has an alternate current flowing through it. Induction heating process design using comsol multiphysics. This is a multiphysics model because it involves fluid dynamics coupled with heat transfer. Adding electromagnetic effects to a multiphysics analysis. Using the rf module and coupling it with the bioheat. The primary inputs are current, voltage, and the material resistivity.
Joule heating induction heating requires the acdc module microwave heating requires the rf module laser heating requires the wave optics module thermal stress requires the structural mechanics or mems module. I tried using joule heating and thermal expansion physics and frequency domain solver in comsol 4. Below is an example of mechanical stress induced in a heating circuit by way of joule heating. The purpose of this experiment is to compare the energy dissipated by the resistor to that absorbed by the water, thereby testing the principle of conservation of energy. A few examples of where this occurs includes conductors in fuses, electronics, power lines, and electric heaters. In comsol, we are trying to use joule heating module for our graduate research. Performing a multiphysics analysis of a thermal microactuator. This multiphysics example simulates the electrical heat generation, heat transfer, and mechanical stresses and deformations of a heating circuit device.
Excerpt from the proceedings of the 2012 comsol conference in boston. Heat transfer rate with electric current using comsol 4. In comsol, there are some tutorial on electrochemical and dcac problems. Joule heating of a microactuator thermalactuatorjh. 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. Note that you can change which equation you work with conductive media or heat transfer in the model tree to the left or under. Now the mathematical representation and explanation of joules law is given in the following manner. Multiphysics modeling of joule heating in an aluminum fuse on a circuit board. Jul 12, 2012 after their meeting this is what he said, unfortunately the solidworks guy told me that there isnt much out there on using the joule heating condition.
The power p absorbed in an electrical resistor of resistance r, current i, and voltage v is given by p i2r v2r vi. How to convert joule heat to temperature, any hint. These instructio ns describe the essential components of. It considers heating due to conduction currents and dielectric loss. Introduction to comsol multiphysics 19982012 comsol protected by u. Joule heating, also known as resistive, resistance, or ohmic 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. This archived webinar provides an overview of simulating joule heating with comsol multiphysics. Veryst is a comsol certified consultant, and we use comsol multiphysics in a wide variety of applications and industries, combining the physical processes of fluid flow, stress analysis, heat transfer, nonlinear materials, contact, vaporization and condensation, acoustics, microwave heating, gas dynamics, and mixing. Capacitors ion optics and charged joule heating and induction heating particle tracing. Analyze heat transfer by conduction, convection, and radiation with the heat transfer module, an addon product to the comsol multiphysics platform. Thermal actuator parameterized comsol multiphysics.
Apply voltage through electrical fiber that causes joule heating. Joules law describes joule heating or ohmic heating or resistive heating. How meshing and computing problems in comsol can be solved in this spesific example. Preset studies are studies that have solver and equation settings adapted to the selected physics, in this example, joule heating. Then youd like to heat the system by joule heating. Some applications such as fuses, floor heaters, heat lamps, and window defrosters rely on joule heating for their operation. The busbar is made of copper while the bolts are made.
Since vavb it is a loss rate of potential energy losspower dissipated in conductor. The acdc module has several acdc interfaces for different types of electric and magnetic modeling. Given the importance of understanding how joule heating can affect everyones designs and its intrin sic multiphysics nature, comsol decided to adopt bus bars as an example to help users learn the soft ware, grasp the simulation work flow, and understand multiphysics. This enables you to couple the physics describing your electrodeposition or etching process to other modules, such as the heat transfer module for studying thermal. Analyze thermal effects with the heat transfer module comsol. Or you are thinking of heating by conductionconvection. The what, why and how of simulating joule heating mdx. The comsol multiphysics approach starts with first principles like transport phenomena, electromagnetic field theory, and solid mechanics as the basic fibers of the. Ive used the joule heating similar to the tutorial model in comsol, but id like to get results with the rf module as well. Overview of simulating joule heating with comsol software. The model couples the physics phenomena involved in one way only. I think because it is a very small part of the software. Modeling joule heating in a thermal microactuator with the comsol software. Ive used comsol for engineering for low frequency magnetic designs aka electromagnets involving heat transfer of electrical joule heating and magnetic field caused magnetostriction and mechanical statics upon that stressstrain.
Note that most conditions in the figure correspond to n 2 being a supercritical fluid, where it has. Excessive heating can result in failure of the device, so modeling with lab. Multiphysics modeling of resistive heating in an aluminum fuse. For users of the acdc module, comsol multiphysics version 5. Browse all of the acdc module updates in more detail below. The possible multiphysics phenomena include thermal contact, nonisothermal turbulent flow, heat transfer in porous media, joule heating, microwave heating, and laser heating.
Im also still not sure if its actually possible to use the rf module as a heating source either. We use the same notations as in comsol multiphysics. With a multiphysics capable simulation tool, you can correctly capture the important aspects of your design. Chapter 2 in our 3part video series details how to add physics and solve the model.