Model Gallery

The Model Gallery features COMSOL Multiphysics model files from a wide variety of application areas including the electrical, mechanical, fluid, and chemical disciplines. You can download ready-to-use models and step-by-step instructions for building the model, and use these as a starting point for your own modeling work. Use the Quick Search to find models relevant to your area of expertise, and login or create a COMSOL Access account that is associated with a valid COMSOL license to download the model files.

Thermal Stress Analysis of a Turbine Stator Blade

The conditions within gas turbines are extreme. The pressure can be as high as 40 bar, and the temperature more than 1000 K. Any new component must therefore be carefully designed to be able to withstand thermal stresses, vibrations and loads asserted by the fluid rushing through the turbine. If a component fails, the high rotational speeds can result in a complete rupture of the whole ...

Simulation of a Microrobot, 3D

A microrobot's leg, which structurally moves due to the rapid application of heat, is modeled in this example. Heat is generated by an electric current and propagates by conduction through the leg and, due to thermal expansion and different thermal expansion coefficients of the leg's materials, a bending action is induced. Thin layers of Al and SiO have also been modeled using a structural ...

Surface Resistor: Thermo-Mechanical Analysis

The drive for miniaturizing electronic devices has resulted in today’s extensive use of surface-mount electronic components. An important aspect in electronics design and the choice of materials is a product’s durability and lifetime. For surface-mount resistors and other components producing heat it is a well-known problem that temperature cycling can lead to cracks propagating through the ...

Prestressed Bolts in a Tube Connection

A tube connection consisting of a flange with four pre-stressed bolts is subjected to tensile forces. Two contact regions are modeled: one between the bottom surface of the flange and the top surface of an additional fixed solid, and the other between the washer under the bolt head and the flange. In order to compute the influence of the tensile force on the stress level in the bolt, a ...

Eigenfrequency Analysis of a Free Cylinder

This model calculates the eigenfrequencies and mode shapes of an unconstrained cylinder in axisymmetry. The model is taken from NAFEMS Free Vibration Benchmarks. The eigenfrequencies are compared with the values given in the benchmark report.

Viscoelastic Material Model

Viscoelastic materials have a time-dependent response, even if the loading is constant. Many polymers and biological tissues exhibit such a behavior. Linear viscoelasticity is a commonly used approximation, where the stress depends linearly on the strain and its time derivatives. For many materials, the viscoelastic properties have a strong dependence on the temperature. A common assumption is ...

Linear Magnetostrictive Transducer

This tutorial shows a 3D model of a magnetostrictive transducer. The magnetostrictive core is made of Terfenol-D. The material behavior is assumed to be linear but magnetomechanically coupled. The core is surrounded by a coil. The transducer housing is made of a ferromagnetic material. The model is solved on a one-quarter symmetric geometry. The static model is solved for different values of ...

Contact Analysis of a Snap Hook Using a Penalty Formulation

Several numerical algorithms exist to tackle structural contact problems. The one used in COMSOL Multiphysics is based on the so-called Augmented-Lagrangian method. An alternative approach presented in this example model is called the penalty method. It is based on the penalty factor formulation related to the penetration of the solid parts in contact. In certain cases, this approach can ...

Vibrations of an Impeller

This tutorial model demonstrates the use of dynamic cyclic symmetry with postprocessing on the full geometry. A 3D impeller with eight identical blades can be divided into eight sectors of symmetry. The model computes the fundamental frequencies for the full impeller geometry and compares them to the values computed for a single sector with the Floquet periodicity boundary conditions applied on ...

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 ...

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