When comsol compiles the equations the complex couplings generated by these userdefined expressions are automatically included in the. In our research group, we usually employ comsol multiphysics. Introduction nanopores have been identified as a key structure for the next generation of biosensors and dna sequencers. The application gallery features comsol multiphysics. Poisson equation based modeling of dc and ac electroosmosis. In his keynote talk at the comsol conference 2018 lausanne, andri bezzola of. After a general introduction to the user interface, several tutorials will take you step by step through sample models that highlight important features. Nanopore, gating, nanoelectrofluidics, ionic transistor, comsol 1. Release notes comsol multiphysics new products in version 4. Comsol conference prague 2006 page principleofac electroosmosis m. It provides an overview of the comsol environment with examples that show you how to use the comsol desktop user interface and the model builder. Instead, they must take advantage of electroosmotic flow. 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.
Numerical simulation of the electrical double layer based on the. By the end you will be well on your way to reaping all. Simulating electroosmotic flow with the microfluidics module. Castellanos, fluid flow induced by nonuniform ac electric fields in electrolytes on microelectrodes.
Furthermore, this example may also be defined and modeled using components. The wet surface feature is used to implement the source term for the water vapor and to. Watch this archived webinar to learn how to model electroosmotic flow, a useful skill for optimizing devices like micropumps and micromixers, with the comsol multiphysics software and addon microfluidics module. Corrosion module, for modeling of corrosion and corrosion protection.
Setup the model using the graphical user interface, then save the model as a mfile. Here, i will describe the concept of electroosmosis and the electrical double layer edl, and how to model these in comsol. As alternative we can use the already constructed geometry by applying the steps from part b. Numerical modeling and analysis of electro osmotic. Electroosmotic flow or electro osmotic flow, often abbreviated eof. Numerical simulation of the electrical double layer based on the poissonboltzmann models for ac electroosmosis flows.
The informative charts give you an idea of comsol s capability by associated files, functions, and builtin options. The analytes in the system are positively charged sodium and a. This tutorial shows how to couple three physics interfaces to model evaporative cooling. Introduction 5 introduction the acdc module is used by engineers and scientists to understand, predict, and design electric and magnetic fields in statics and lowfrequency applications.
Handout 6 comsol tutorial 11 comsol is a finite element based simulation software. It also provides a quick introduction to creating applications using the application builder. All clones that disobeyed order 66 updated duration. Ac electroosmosis simulation results n g green a ramos a gon ale h morgan and an. Microfluidics electrostatics fundamentals related to electroosmosis duration. Electroosmotic flow in porous media comsol multiphysics. The first half of the workshop focuses on comsol s general purpose multiphysics features which will be used to set up coupled electorkinetic and magnetodynamic simulations including. Uh innovation centre college lane hatfield hertfordshire al10 9ab. Modeling of an acelectroosmosis based microfluidic mixer.
Pdf numerical simulation of the electrical double layer. Metu has a limited classkit license of comsol, which has only a few of the basic modules. In order to solve governing equations of ac electroosmosis, a commercial software comsol multiphysics is implemented. Microfluidics electrostatics fundamentals related to. Poissonboltzmann models for ac electroosmosis flows. If you click on no flux 1 you can find the equation that is applied under equation and the boundary on which this equation is applied. Observation of streamlines and numericalobservation of streamlines and. Introduction to application builder comsol multiphysics.
Pdf study the electroosmosis flow in microchannel with. This study demonstrates a pore whose conductive properties may be externally controlled in realtime. Where can i find comsol multiphysics tutorial models. Simulation of highly nonlinear electrokinetics using a. Its spatial characteristics are 100 microns wide by fifty microns long. The pressure and the velocity field are the solution of the navierstokes equations. Particular functionality may be common to several products. Comsol, comsol multiphysics, comsol reac tion engineering lab, and. Keywords tas, biomems, electroosmosis, comsol multiphysics, electrokinetic flow, ionic fluid. This example describes an array of heating tubes submerged in a vessel with fluid flow entering at the bottom. Modeling electroosmotic flow and the electrical double layer. To help the learning process, there is a streamlined.
The ac electroosmosis is mostly based on the coulombic interaction between an. Tutorial for running comsol files from comsol website. To view the mass transfer boundary conditions, expand the transport of diluted species and view the various tabs which include boundary conditions and initial values. The effects that need to be taken into account are heat transfer, transport of water vapor, and fluid flow. To start, we guide you through the comsol multiphysics user interface, explaining the purpose and use of each aspect. Use the comsol desktop to get your first model implemented using the comsol java api. Pdf the growing interest of researchers in the phenomenon of electrokinetic can be. Read this book if you are new to comsol multiphysics. Lowvoltage electroosmotic micropump solved with comsol multiphysics 3. This is a multiphysics model because it involves fluid dynamics coupled with heat transfer. Microfluidic devices are so small that the micropumps and micromixers that control and mix the fluid inside the device cannot involve any moving components. In electroosmosis the uncompensated ions in the charged electric double layer edl present on the fluid surfaces. Pdf lowvoltage electroosmotic micropump solved with. In part a of the tutorial we construct the geometry of the problem to be solved.
These instructional videos then take you through each step of the modeling workflow, including. Introductory electrostatics concepts required for an integral boundary layer analysis of the electrical double layer to predict electroosmotic flow. Watch this selfguided series of tutorial videos to learn how to use the comsol multiphysics software from the comfort of your desk. The available the available study types are listed in table 11 with column definitions after the table. Multiphysical modeling of dc and ac electroosmosis. There are many applicationspecific tutorial models, so the more modules you have installed, the more tutorial models you will have at your disposal. It comes with several modules under the titles structural mechanics, acoustics, fluid flow, heat transfer, chemical engineering, electromagnetics, etc. Metu mechanical engineering department me 582 finite. In addition, we discuss topics such as how to treat the electrical double layer and turning a model into a userfriendly simulation app. 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.
1110 1174 1337 1087 1560 969 189 689 724 1428 1452 668 83 1238 1507 798 1565 832 15 467 1403 506 28 1259 58 864 1630 795 977 962 450 841 1333 77 872 54 1194