COMSOL Search

Showing results 21-40 of 690

Modelling Multilayer Systems with Time-Depended Heaviside and New Transition Functions

. The thermoelasticity analysis of the system with residual stress was carried out using COMSOL Multiphysics. Heaviside functions applicable for such problems has computational advantage over moving grid (ALE). ...
www.comsol.com/paper/1684

Interactions of Magnetic Particles in a Rotational Magnetic Field

Particle-particle interactions are usually neglected when considering the behaviour of magnetic particle's so called magnetic beads in e.g. a microfluidic device. However, if the particle density exceeds a critical limit, this assumption might not lead to proper results anymore. In this paper the particle-particle interaction of magnetic beads in an external magnetic field will be discussed. It is shown that the m ...
www.comsol.com/paper/4878

COMSOL Derived Universal Scaling Model For Low Reynolds Number Viscous Flow Through Microfabricated Pillars – Applications to Heat Pipe Technology

Cooling of high-power density electronic devices remains a challenge. Microfluidic heat-pipes with the potential of achieving ultra-high thermal conductivities offer a low-cost technology for cooling electronics. To achieve high thermal conductivity, it is critical to maximize the rate of liquid transport inside the heat pipe. We propose a novel array of microfabricated pillars to maximize liquid transport. Such p ...
www.comsol.com/paper/7080

Thermal Simulation of an Evaporation Reactor

. Then the simulation aim is to take in account heat transfer by conduction and radiation as well as evaporation direct and non direct effects on thermal transfer. The presented simulation are a coupled solving of heat transfers including heat of state change of the material, and ALE model to follow the powder surface change during evaporation. ...
www.comsol.com/paper/10959

Elastoplastic Models of the Interaction between Active Fronts of the Southern Alps and Dinarides (NE Italy and NW Slovenia)

We use GPS measurements and Finite Element analysis to investigate strain accumulation in the interaction between active fronts of the Southern Alps and Dinarides at the northern edge of the Adriatic micro-plate. We develop a three dimensional model of the area taking into account the regional topography, approximating ...
www.comsol.com/paper/6942

3D Hydrogeological Modeling - From a Theoretical 2D Model through a Medium Scale Application up to a Challenge: Simulations at Basin Scale

. We built a section with these physics: a) Darcy's law, b) Richards' equation, c) ALE to show surface deformation, d) Hydrogeologcal recharge, e) solute transport . After this we applied this modeling work-plan in a pollution site, in order to define a capture zone of nine wells with double-screens pumping simultaneously ...
www.comsol.com/paper/15353

Modeling of Coupled Mass and Heat Transfer and Expansion During Baking of Bread in a Mould

. The algebraic differential equations system use a moving mesh ALE. The next step of this study is to use the model to explore new heating modes (low temperature baking). ...
www.comsol.com/paper/15809

Numerical Modeling of a Levitated Liquid in a Cold Crucible

. In this paper, the main results of a 3D electromagnetic model of a cold crucible from a former paper are briefly summarized. Then a 2D time-dependent electromagnetic-fluid mechanics coupled model with a deformed mesh technique (ALE method ...
www.comsol.com/paper/2934

Use of COMSOL Multiphysics for Automated Electrostatic MEMS Sensor Design

. The discretized design variables included material distribution, sensing and actuation electrode placement, length of the initial gap, actuation voltage, and beam thickness. The cantilever model makes use of three COMSOL Multiphysics Applications - 3D Structural with Squeezed Film Damping (SMSLD plus MMFD), Deformed Mesh (ALE ...
www.comsol.com/paper/8852

Simulation of Novel Groundwater Lowering Technique using Arbitrary Lagrangian-Eulerian Method

. The dynamics of hydraulic head changes in unconfined aquifer is modeled using arbitrary Lagrangian-Eulerian (ale) moving mesh method. Numerical results from the model show the same trends as measured data from field experiments. ...
www.comsol.com/paper/11083

Using Coupling Variables to Solve Compressible flow, Multiphase flow and Plasma Processing Problems

This presentation summarizes three different types of modeling using COMSOL Multiphysics. It is divided into three parts: Compressible flow, Multiphase flow, and Plasma Simulations. For the first part, we perform a special case study of the Mass Flow Verifier. A Mass Flow Verifier validates the accuracy of a Mass Flow Controller by measuring the rate of change of pressure in a fixed volume. In our present w ...
www.comsol.com/paper/1777

3D Dynamic Linear Electromagnetic Actuator Modeling and Simulation

Single coil actuators are representing one important component of ABB’s medium voltage reclosers. Their performance is strongly influenced by the considered material properties as well as by the electronic control units’ properties that will power the actuator. Therefore, this paper focuses on electromagnetic actuators modeling and simulation in COMSOL Multiphysics®. ...
www.comsol.com/paper/15409

Thermal Drift in a Microwave Filter Cavity

Microwave filters are used to eliminate unwanted frequency components in the output from microwave transmitters. They are typically inserted between a power amplifier and an antenna. The amplifiers are nonlinear and produce harmonics that must be eliminated with filters that have a rather narrow passband. Due to high power loads but also possibly from harsh environmental conditions (such as a cellular base s ...
www.comsol.com/model/692

Dynamic Electromagnetic Analysis of Guitar Pickup Aided by COMSOL Multiphysics

In transient analyses of electromagnetic fields with moving media, it is difficult to grasp the phenomena theoretically in the same manner of the convective heat diffusion since the treatment of the coupled problem with the field and dynamics must be necessary. In this presentation, we illustrate the dynamic magnetic flux patterns in the electric guitar pickup, where the string will move over the permanent magnet sur ...
www.comsol.com/paper/14668

Modelling of Thermal Stresses in Industrial Continuous Casting Processes

This paper reports on progress in the implementation of COMSOL Multiphysics 3.2 to model thermal stresses in a three-dimensional solidifying shell, as occurs typically in the industrial continuous casting of copper, copper alloys and steel. Computer memory requirements prohibit a direct 3D numerical simulation of the temperature and the stresses. Instead, we use the fact that casting geometries are usually slende ...
www.comsol.com/paper/1109

Investigating the Impacts of Hydrogeological Parameters on DSI Efficiency through Numerical Simulation

Düsensauginfiltration (DSI),‘nozzle-suction-infiltration’, is a new method for dewatering that avoids groundwater abstraction from the aquifer. Drawdown is achieved via pumping of groundwater at upper abstraction section, meanwhile, all the pumped water is injected through the same borehole, but in greater depth. We use COMSOL Multiphysics® for the development of a 2D model that simulates groundwater fl ...
www.comsol.com/paper/15415

2D Axial-Symmetric Model For Fluid Flow And Heat Transfer In The Melting And Resolidification Of A Vertical Cylinder

. The deformation of free surface is calculated using a moving mesh by the way of the ALE method. The calculated temperatures are compared with thermocouples measurements. The calculated dynamic shape of the free surface during melting and resolidification is compared with data obtained from high speed videos. ...
www.comsol.com/paper/7837

3D Fluid-Structure Interaction Simulation of an Obstacle in a Fluid Channel

In this model, fluid is flowing through a channel containing a flexible obstacle. Due to the viscous and pressure forces asserted by the fluid, the obstacle bends. With the obstacle undergoing a large deformation, the fluid flow domain also changes considerably. COMSOL Multiphysics takes these changes into account by computing the flow field on a moving mesh attached to the obstacle. In this example model, t ...
www.comsol.com/model/987

Simulation of Pumping Induced Groundwater Flow in Unconfined Aquifer Using Arbitrary Lagrangian-Eulerian Method

. Meanwhile, the dynamics of hydraulic head changes is modeled using arbitrary the Lagrangian-Eulerian (ale) method. In a verification test the numerical results agree well with analytical solution (Thiem equation). An application is presented, evaluating a pumping test conducted at a test site ...
www.comsol.com/paper/13355

Numerical Modeling of Pit Growth in Microstructure

. The steel-electrolyte front movement is simulated with the help of the arbitrary Lagrangian-Eulerian (ALE) meshing technique provided as part of the commercial partial-differential equation solver software, COMSOL ...
www.comsol.com/paper/13077