The fluid-structure acoustics coupling is available in the Acoustics Module.įor frequency-domain simulations, a specialized solver for wave propagation analysis makes it possible to handle higher frequencies (shorter wavelengths) using the finite element method. The new elastic wave functionality is available for users of the Structural Mechanics Module, MEMS Module, and Acoustics Module. The included multiphysics capabilities can seamlessly combine linear elastic wave propagation in a solid and its transition to a fluid as an acoustic pressure wave, and back again. The method also has low frequency applications, such as in seismology.
New functionality based on the time-explicit discontinuous Galerkin method enables efficient multicore computations of ultrasound propagation in solids and fluids, including realistic materials featuring damping and anisotropy. Ultrasound technology is becoming increasingly important in a wide range of applications spanning from process engineering and nondestructive testing to consumer electronics. New Solver Technology for Acoustics Simulations "The new tools for dimensions and constraints can be used together with model parameters in COMSOL Multiphysics to drive the simulation, whether for a single run, parametric sweep, or parametric optimization." "We have carefully integrated the new dimensions and constraints tool in the Model Builder so that it becomes a natural part of the COMSOL Multiphysics workflow," said Daniel Bertilsson, technology manager for mathematics and computer science at COMSOL. The Design Module provides a new sketching tool that makes it easy to assign dimensions and constraints to planar drawings for 2D models and 3D work planes.
Powerful Parametric Sketching with Dimensions New and updated solvers speed up a wide range of simulations. Two new add-on products, the Porous Media Flow Module and the Metal Processing Module, further expand the product suite's multiphysics modeling power. In version 5.5, the Design Module provides an entirely new sketching tool for easier creation and more versatile parametric control of geometry models. You can change the integration order for any weak expression from Equation View by editing the text field.COMSOL announces the latest version of its COMSOL Multiphysics® software. The fact that there may be some higher-order terms present in the polynomials is another reason to use a more accurate integration rule than what would seem necessary at first glance.Īnother reason that you may see a higher integration order than expected in Equation View for a certain contribution is that it may be necessary to ensure symmetry in a stiffness matrix. The shape function order indicated in the user interface shows the highest complete polynomial within the shape functions. This blog post on inspecting a mesh in COMSOL Multiphysics contains more information about mesh quality.Įven if an element shape function is called “quadratic”, it may (in some cases) contain higher-order terms. The Jacobian effect is, by the way, one reason why severely distorted elements perform worse than those with an ideal shape. Because of this, it is wise to have some margin in the selected integration order. The Jacobian will, in general, be a rational function (polynomials both in numerator and denominator), so it may not even be exactly integrable by this type of numerical quadrature. \displaystyle \int_ \right | \ d\xi d\eta
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