Documentation

Analysis Types

The SimScale Workbench is a single interface that supports a variety of different simulation types. A central concept of the Workbench is the organisation of simulation setup options by analysis type. Analysis types define the general use case behind a simulation and help keep the setup tree short and compact, by only exposing use-case-compatible settings of the solver in the interface.

As a first step in any new simulation setup, the analysis type template that best fits the simulation case needs to be selected.

In the following we’ll introduce the currently supported analysis types and their basic use cases:

Fluid dynamics (OpenFOAM)

  • Incompressible Fluid Flow

    This analysis type is used to run CFD simulations in which fluid density variations are negligible. This assumption is typically valid when velocities and temperature gradients are small.

  • Compressible fluid flow

    This analysis type is used to run CFD simulations where density variations have a significant influence on the system. This commonly occurs when the flow velocities exceed ~30% of the speed of sound.

  • Convective heat transfer

    This analysis type is used when temperature changes in the fluid lead to density variations and movement of the fluid due to gravity. This solver can be used for natural convection but also for forced convection, when flow motion is induced by external forces.

  • Conjugate heat transfer (CHT)

    This analysis type is used is to simulate the heat transfer between solid and fluid domains by exchanging thermal energy at the interfaces between them.

  • Multiphase

    This analysis type is used to simulate the time-dependent behavior of fluid mixtures, for example air and water. The analysis is carried out using the VoF (Volume of Fluid) method.

Fluid dynamics (LBM solver)

  • Incompressible Fluid Flow (LBM) (Professional Feature)

    This analysis type is used to simulate transient effects of external flow around objects using the Lattice Boltzmann method (LBM). It assumes that fluid density variations are negligible, which is typically valid when velocities and temperature gradients are small.

Solid mechanics (Code Aster)

  • Static

    This analysis type is used to determine the displacements and stresses in structures or components caused by the applied constraints and steady loads – inertia and damping effects are ignored. A Static analysis can be either linear or nonlinear.

  • Dynamic

    This analysis type enables the time-dependent calculation of displacements and stresses in one or more solid bodies. If the rate of application of the load is important, then a dynamic analysis should be used, otherwise a static analysis might be sufficient.

  • Heat transfer

    This analysis type is used to determine the temperature distribution and heat flux in a solid body.

  • Thermomechanical

    This analysis type is used to determine the structural and thermal stress of a solid object subjected to thermal and structural loads.

  • Frequency analysis

    The Frequency analysis type is used to calculate the natural frequencies of constrained or free parts and assemblies. Besides the numerical value of the eigenfrequencies, the results provide insights into the deformation behaviour of the corresponding eigenmodes.

  • Harmonic

    This analysis type is used to determine the response of a structure under steady-state periodic (sinusoidal) loading at a given range of frequencies.

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