New Features and models in COMSOL Multiphysics 3.4

The version 3.4 release brings a number of new features, improvements, and new models to COMSOL Multiphysics and its add-on products.

COMSOL Multiphysics – General improvements

  • Expanded support for shared-memory parallelism: meshing, assembly, preconditioners, multigrid, sparse matrix-matrix product
  • Built-in segregated solver
  • Improved Galerkin least-squares (GLS) method for streamline diffusion
  • Support for non-ideal pointwise constraints
  • Improved internal solid modeling kernel
  • Free quad meshing in 2D and on 3D faces
  • Boundary layer meshing
  • Copying of meshes from one boundary to another
  • Boundary distance variables
  • Additional units
  • Improved and reorganized boundary conditions for fluid-flow modeling
  • New wave and grayprint colormaps
  • Tools for computing volume, area, center of gravity, moment of inertia, etc.
  • Added support for MATLAB versions 7.4 (2007a) and 7.5 (2007b)
  • New model:
    • Solution of the two-term Boltzmann equation for an oxygen plasma

Material Library

  • Improved search feature
  • New materials
  • Additional material properties

AC/DC Module

  • Support for generalized constitutive relations: B(H) and H(B)
  • Support for mixed AC/DC simulations (small-signal analysis)
  • SPICE import directly from the COMSOL Multiphysics user interface
  • Symmetry and periodic boundary condition improvements
  • SOR gauge smoother for solving magnetostatics problems without explicit gauge fixing
  • New models:
    • Joule heating of a cable, clamp, and pole attached to a circuit of high-current cables and a battery
    • The model as above, connected to an external circuit set up by the new SPICE-import feature
    • Induced currents and resulting Lorentz forces in a magnetic brake
    • Propulsion of a projectile through electromagnetic fields using the transient electric and induction currents formulation
    • Analysis of an inductor and its core with nonlinear inductance using the new small-signal analysis feature

Acoustics Module

  • Ultraweak variational formulation (UWVF) for pressure acoustics
  • New application mode for piezoelectrical modeling
  • Piezoelectric Material Properties database
  • New models:
    • Piezoelectric, structural, and acoustic model of a transducer using the new Piezo Axial Symmetry application mode
    • Influence on the resonance frequency of an adsorbed gas in a SAW sensor using the new Piezo Plane Strain application mode
    • Scattering of ultrasound waves from a cylinder using the new ultraweak variational formulation

CAD Import Module

  • Ability to save repaired and defeatured CAD drawings in the Parasolid format
  • Upgrade of the Parasolid engine

Chemical Engineering Module

  • Bubbly Flow application mode for macroscopic modeling of mixtures of liquid and gas bubbles
  • Mixer Model application mode for macroscopic modeling of mixtures of liquids and solid particles/liquid bubbles/droplets
  • Improved and reorganized boundary conditions for fluid-flow modeling
  • Boundary layer meshing
  • Improved Galerkin least-squares (GLS) method for streamline diffusion
  • Improved performance and robustness for fluid-flow modeling
  • Predefined multiphysics entries for flow with variable density
  • Predefined multiphysics entries for fluid-solid thermal interaction/conjugate heat transfer
  • New models:
    • Boiling of a liquid using the level set two-phase flow application mode
    • Bubbly flow in a gas scrubber using the new bubbly flow application mode
    • Capillary filling using the level set two-phase flow application mode
    • Transport of a surge of analyte in a chromatography column
    • Two-phase flow of a dense suspension using the new mixture model application mode
    • Droplet breakup using the level set two-phase flow application mode
    • Electrophoretic effects utilized for sample injection in a valve
    • Sedimentation in a secondary clarifier for water treatment using the new mixture model application mode
    • Fluid flow coupled to thermal and material balances with chemical reactions using the new application modes for flow with variable density

Earth Science Module

  • Export from COMSOL Reaction Engineering Lab
  • Improved and reorganized boundary conditions for fluid-flow modeling
  • Improved Galerkin least-squares (GLS) method for streamline diffusion
  • New model:
    • Pesticide transport and reactions using the new Reaction Engineering Lab import feature

Heat Transfer Module

  • Axisymmetric radiation
  • Predefined multiphysics entries for flow with variable density
  • Predefined multiphysics entries for fluid-solid thermal interaction/conjugate heat transfer
  • Improved Galerkin least-squares (GLS) method for streamline diffusion
  • New model:
    • Axisymmetric analysis of an inductor using the new surface-to-surface radiation feature for axisymmetry

MEMS Module

  • Improved piezoelectric application mode that is compatible with application modes for electrostatics and electric currents and where you can change the structural material model (piezo/isotropic/anisotropic/off) and electric part (on/off)
  • Piezoelectric Material Properties database
  • Convection and Diffusion application mode
  • Contact usability improvements (automatic choice of penalty factors)
  • Export from COMSOL Reaction Engineering Lab
  • Film Damping application mode extended with slide-film damping boundary condition
  • Improved and reorganized boundary conditions for fluid-flow modeling
  • Improved Galerkin least-squares (GLS) method for streamline diffusion
  • New models:
    • Piezoresistive effects in a device incorporated in an elevator button
    • Operation of a gyroscope influenced by slide-film damping
    • Influence on the resonance frequency of an adsorbed gas in a SAW sensor using the new Piezo Plane Strain application mode
    • Microreactor with reaction mechanism set up using the new Reaction Engineering Lab import feature

RF Module

  • Fast far-field processing
  • Lumped ports for EM waves
  • Symmetry and periodic boundary condition improvements
  • New models:
    • Nonlinear sweep in an eigenvalue analysis with a normalization equation for the eigenvalue using the new periodic boundaries
    • Calculation of microstrip impedance using two different terminations with the new lumped port conditions
    • SAR analysis of the radiation emanating from a cellular phone
    • Electric fields used to detect oil reservoirs beneath the sea

Structural Mechanics Module

  • Follower forces
  • Contact usability improvements (automatic choice of penalty factors)
  • Improved piezoelectricity application mode that is compatible with application modes for electrostatics and electric currents and where you can change the structural material model (piezo/isotropic/anisotropic/off) and electric part (on/off)
  • Piezoelectric Material Properties database
  • Script-based tools for fatigue analysis as a postprocessing step for structural models supporting different cases of load histories and proportional/nonproportional loading
  • New models:
    • Stent deformation during deployment in an artery
    • The new fatigue-analysis feature implemented in an analysis of a cylinder with a small perforation
    • Piezoresistive effects in a device incorporated in an elevator button
    • Clay under load using the Mohr-Columb yield condition
    • The new fatigue analysis done on a shell structure with a square-shaped cutout
    • Piezoelectric, structural, and acoustic model of a transducer using the new Piezo Axial Symmetry application mode
    • Influence on the resonance frequency of an adsorbed gas in a SAW sensor using the new Piezo Plane Strain application mode
    • A benchmark model of the new fatigue-analysis feature; analyzing a shaft with two different radii
    • Contact and plastic deformation in a snap hook incorporated in the button of a car panel
    • Contact and elasto-plastic analysis of a circular plate deformed by a spherical punch
    • Frequency-response analysis and mechanical heating of a beam using the new mechanical-heating feature
    • Structural and fatigue analysis of a lightweight wheel rim using the new features for fatigue analysis

Reaction Engineering Lab

  • Parameter estimation for building models from experimental data
  • Export of models to the Earth Science Module and MEMS Module
  • New models:
    • Thermal decomposition of methane in a catalytic bed
    • Catalytic cracking of flashed distillate feedstock in a plug-flow reactor
    • Study of the reaction mechanism for catalytic hydrogenation of aldehydes
    • The new parameter estimation tool used on multiple sets of data for an enzyme catalyzed reaction
    • Different variations of the new parameter-estimation feature on the analysis of kinetics data for CO absorption in water
    • Degradation mechanism and transport of Aldicarb in soil
    • Parameter estimation of a batch reactor process for peroxide decomposition
    • Mechanism for a surface reaction and transport in a microreactor