Simulation & CAE Software

Simulation software should be chosen around the physical question you need to answer.

A structural analyst solving nonlinear contact does not have the same requirement as a design engineer who wants a fast stress check before changing a CAD model. CFD, electromagnetic simulation, multiphysics coupling, building-structure analysis, and geometry preparation all belong to the wider CAE process—but they are not interchangeable software jobs.

Use this page to identify the type of simulation you actually need, rule out mismatched solution classes, and continue to the relevant product destination.

Start with the physics and workflow

The first useful question is therefore not “Which CAE package has the most solvers?”

It is: what physical behavior must you predict, at what level of fidelity, and at what stage of the design process?

Advanced structural FEA

Choose a high-fidelity structural-analysis path when the model must represent behavior that goes beyond a quick design check.

Typical decision drivers include:

• nonlinear material response;
• large deformation;
• complex contact;
• dynamic loading;
• vibration;
• thermal-structural effects;
• fatigue or durability;
• highly detailed assemblies;
• specialist solver requirements.

SIMULIA Abaqus

SIMULIA Abaqus is a specialist structural FEA path for problems where nonlinear behavior, complex contacts, materials, deformation, impact, vibration or advanced structural response dominate the analysis.

Dassault Systèmes currently positions Abaqus around implicit and explicit finite-element simulation of complex mechanical and structural behavior, including nonlinear material and contact problems.

Start here when solver depth and control over a difficult structural problem matter more than minimizing setup effort.

Ansys structural simulation

Ansys is the approved broader Ansys simulation destination in this architecture.

Current Ansys releases include Mechanical as the flagship structural-analysis application inside the Ansys simulation environment, with Workbench coordinating data between structural, fluids and other physics.

This path makes sense when structural analysis is part of a wider Ansys simulation workflow or when analyses need to connect across multiple Ansys physics products.

Autodesk Nastran / Inventor Nastran

Autodesk Nastran is the approved ProSoftStore destination for the Autodesk Nastran structural-analysis path.

Current Autodesk product branding is Inventor Nastran. Autodesk describes it as Inventor-integrated FEA covering structural study types including nonlinear behavior, dynamics, heat transfer, fatigue and related analysis.

Choose this route when Inventor is already central to the mechanical-design workflow and keeping simulation close to the CAD model is a strong requirement.

Because the current vendor name differs from the existing target label, verify the exact ProSoftStore product identity before purchasing.

Fast structural analysis during design

Not every structural question needs a traditional high-fidelity FEA workflow.

Altair SimSolid is aimed at rapid structural simulation directly on full-featured CAD assemblies without the traditional geometry-cleanup and meshing workflow.

Current Altair documentation describes SimSolid as a structural-analysis environment for large and complex assemblies, covering structural, dynamic and thermal analyses while eliminating conventional geometry simplification and meshing.

This path becomes attractive when:

• design geometry changes frequently;
• large assemblies need repeated evaluation;
• turnaround time matters heavily;
• the analyst wants to reduce preprocessing effort;
• rapid comparison of design alternatives matters more than following a conventional mesh-centric workflow.

When SimSolid is a poor fit

Do not choose it simply because setup is faster.

If your validation procedure depends on a specific traditional FE formulation, detailed mesh control, solver-specific material models, regulatory methodology, or an established Abaqus/Ansys/Nastran process, those requirements may outweigh preprocessing speed.

CFD: flow, pressure and heat transfer

Choose CFD when fluid behavior itself is the primary engineering question.

Examples include:

• internal liquid or gas flow;
• pressure loss;
• ventilation;
• aerodynamic performance;
• electronics cooling;
• heat transfer involving fluid motion;
• flow distribution;
• thermal management.

Ansys Fluent

Ansys Fluent is the approved Ansys CFD destination.

Ansys continues to develop Fluent in its 2026 R1 fluids line, with workflows spanning meshing, fluid physics, thermal problems, HPC and GPU-enabled solving.

Evaluate Fluent when CFD is a specialist analysis discipline and the project needs a broad, high-fidelity fluids environment.

Autodesk CFD

Autodesk CFD is a current Autodesk CFD path for engineering flow and thermal simulation.

Autodesk describes it around prediction of liquid and gas behavior, pressure/flow distribution and heat transfer in engineering systems.

It may be a more natural candidate when the design process is already Autodesk-centered and the simulation problem is principally flow or thermal behavior.

Do not choose CFD when the primary question is structural

A temperature distribution that causes stress may eventually require both thermal/fluid and structural analysis.

That does not make a structural FEA tool and a CFD solver direct substitutes.

Start with the physics that drives the problem, then determine whether coupling between domains is required.

Multiphysics: when one physics domain is not enough

Some systems cannot be represented adequately by a single isolated physics model.

Examples include:

• thermal stress;
• fluid-structure interaction;
• Joule heating;
• electromagnetics coupled to heat transfer;
• electrochemistry with transport;
• acoustics coupled with structures;
• thermal-electrical behavior.

COMSOL Multiphysics

COMSOL is the clearest approved destination when coupled physics is itself the central requirement.

COMSOL currently positions Multiphysics as a general-purpose platform where structural mechanics, electromagnetics, acoustics, fluid flow, heat transfer, chemical engineering and other physics can be connected within a common modeling environment.

Choose this branch when the interaction between physics domains matters more than optimizing one specialist solver in isolation.

HyperWorks

HyperWorks is a broader CAE environment spanning modeling, structural simulation, optimization, design exploration and additional multiphysics workflows through the Altair tool portfolio.

Current Altair documentation includes tools for high-fidelity FE modeling, results visualization, fatigue, multidisciplinary design exploration and multiphysics preparation.

This route makes sense when the requirement extends beyond one solver into a broader simulation and optimization toolchain.

Electromagnetic and electromechanical simulation

Electromagnetic CAE has another major internal split: low-frequency devices, high-frequency/RF systems, electronics, electric machines and full electromagnetic systems may require different solver technologies.

Ansys Electronics

Ansys Electronics is the approved Ansys electronics-simulation destination.

Current Ansys 2026 R1 packages include Electronics Desktop applications such as HFSS, Maxwell, Icepak and Q3D, spanning electromagnetic and electronics-oriented simulation.

Consider this route when electromagnetic simulation needs to remain connected to the wider Ansys electronics and multiphysics ecosystem.

CST Studio Suite

CST Studio Suite is a specialist electromagnetic-simulation environment.

Current SIMULIA materials describe CST Studio Suite as providing multiple electromagnetic field solvers across time- and frequency-domain methods, with application ranges extending from static fields into high-frequency systems.

This is a relevant path for antennas, RF/microwave, EMC, signal-related electromagnetic behavior and other problems where the electromagnetic solver itself is central to the decision.

Altair Flux

Altair Flux is focused on low-frequency electromagnetic and thermal simulation.

Altair’s current 2026 documentation describes Flux around magnetic, electrical, thermal and coupled electromagnetic/thermal applications. It also notes an important workflow change: Flux 3D and Flux PEEC are no longer offered in the same form from version 2026, with SimLab taking over those project paths.

That makes exact workflow and release verification particularly important before purchase.

Early-stage simulation and design exploration

Simulation can be used either to certify a mature design or to shape the design while it is still changing.

Those are different user jobs.

Ansys Discovery

Ansys Discovery is aimed at rapid simulation during design exploration.

Current Ansys materials describe Discovery as an entry/design-stage environment combining geometry editing with rapid structural, thermal and fluid analysis, while retaining a path into higher-fidelity Ansys solvers.

Choose this direction when engineers need fast feedback while geometry and design parameters are still moving.

Do not assume it replaces specialist Mechanical or Fluent workflows when the project demands their depth, validation method or solver controls.

Altair Inspire

Altair Inspire combines concept design with structural analysis, optimization, motion, CFD and manufacturing-oriented design exploration.

Current Altair documentation explicitly supports structural analysis using SimSolid or OptiStruct and includes topology, topography and gauge optimization workflows.

This path is especially relevant when simulation is being used to drive the shape or concept, rather than only validate a nearly finished design.

Geometry preparation before simulation

Geometry preparation is not a solver category, but it can be the dominant bottleneck in a CAE workflow.

Ansys SpaceClaim is relevant when the primary task is to prepare geometry for simulation:

• repair imported CAD;
• remove unnecessary features;
• simplify models;
• extract fluid volumes;
• modify geometry quickly;
• prepare scan or STL data;
• create analysis-ready geometry.

Ansys currently positions SpaceClaim around geometry preparation and rapid direct modeling, and 2026 R1 packages continue to include it.

Important distinction

If your problem is “I cannot prepare this geometry efficiently for analysis,” SpaceClaim may be the right destination.

If your problem is “I need to calculate structural stress or fluid flow,” a solver destination still owns that physics job.

If your shortlist specifically involves SpaceClaim against a mechanical CAD environment, the approved decision-support article is SOLIDWORKS Premium vs Ansys SpaceClaim.

Structural analysis for buildings

Autodesk Robot Structural Analysis serves a narrower structural-engineering workflow than general mechanical FEA.

Autodesk currently positions Robot Structural Analysis Professional around structural load analysis, member verification, static/nonlinear/buckling/dynamic analysis and BIM-connected exchange with Revit.

This is the relevant branch when the object being analyzed is a building structure and code-based structural/BIM workflows matter.

For mechanical products, machines and components, use the general structural CAE branches instead.

Seven questions that usually decide the CAE class

1. What physics must be solved?

Start with the physical phenomenon:

• structural mechanics;
• fluids;
• heat transfer;
• electromagnetics;
• coupled multiphysics;
• building structural behavior.

A broad industry label such as “engineering simulation” is not specific enough to select software.

2. Is the analysis exploratory or authoritative?

A design engineer asking “Which concept looks better?” has a different requirement from an analyst generating a formal high-fidelity validation model.

Fast design exploration may favor Discovery, Inspire or SimSolid.

Detailed nonlinear, coupled or specialist validation may push the workflow toward Abaqus, Ansys, COMSOL, CST or another expert system.

3. How complex is the physical behavior?

Identify whether the model requires:

• linear or nonlinear response;
• complex contact;
• large deformation;
• dynamic or transient effects;
• turbulence or advanced flow physics;
• electromagnetic frequency-domain behavior;
• strongly coupled physics.

Solver depth becomes much more important as these requirements increase.

4. How expensive is model preparation?

For some teams, solving is not the bottleneck. Geometry cleanup, defeaturing, meshing and repeated design changes consume more time.

If that describes your workflow, compare SimSolid, Discovery, Inspire or SpaceClaim-driven preparation against the traditional analysis process—not only solver specifications.

5. Must multiple physics domains interact?

Do not confuse “the product supports several physics types” with true multiphysics coupling.

If one simulation must transfer information into another—or several fields must be solved together—verify the exact coupling workflow you need.

6. What existing ecosystem must the analysis connect to?

Current CAD, BIM, data-management and solver environments can materially change the choice.

For example:

• Inventor-centered analysis may favor the Inventor Nastran route;
• BIM structural workflows may favor Robot Structural Analysis;
• Ansys users may value Workbench-connected physics;
• multidisciplinary simulation may favor COMSOL or a broader Altair environment.

Verify current integrations and release compatibility rather than relying on product-family familiarity.

7. How will you validate the model?

Before selecting the software, determine:

• required verification benchmarks;
• industry procedures;
• material-model requirements;
• solver method;
• mesh requirements;
• correlations to test data;
• reporting and traceability expectations.

The fastest workflow is not automatically the correct workflow when validation methodology is prescribed.

Quick disqualifiers

This Simulation & CAE hub is probably the wrong starting point if:

• the main task is creating the product geometry rather than validating its behavior;
• the primary job is CNC programming or manufacturing toolpaths;
• architectural authoring/BIM is the central workflow rather than analysis;
• PCB layout is the actual task rather than electromagnetic/electronics simulation;
• visualization or rendering is the desired output;
• you already know the exact solver and only need a version, license, module, compatibility or pricing decision.

In those cases, return to Home or proceed directly to the appropriate transactional destination.

One current architecture caution: Inspire Studio

The approved ProSoftStore registry currently places Altair Inspire Studio under Simulation & CAE.

However, current Altair documentation describes Inspire Studio primarily as a 3D conceptual modeling and rendering environment, centered on NURBS modeling, form development and visualization rather than CAE solving.

For that reason, this page does not recommend Inspire Studio as a primary simulation route pending architecture revalidation.

This does not change its current URL or canonical parent inside the approved registry.

Before you choose a simulation product

Once the right simulation class is clear, verify the mutable details at product level:

• exact current release;
• solver and physics modules included;
• operating-system support;
• CPU, GPU and memory requirements;
• HPC or cloud-compute requirements;
• CAD/BIM integration versions;
• supported material models;
• geometry and mesh limitations;
• file interoperability;
• license configuration;
• vendor lifecycle and support;
• current ProSoftStore availability and commercial conditions.

CAE products can differ significantly by module, bundle and solver entitlement. A product family name alone is not enough to confirm that the exact analysis you need is included.

Choose your next step

For high-fidelity structural FEA, evaluate SIMULIA Abaqus, Ansys, or the approved Autodesk Nastran destination.

For fast structural iteration, continue to Altair SimSolid.

For fluid and thermal-flow simulation, compare Ansys Fluent and Autodesk CFD.

For coupled multiphysics, continue to COMSOL or evaluate the broader HyperWorks environment.

For electromagnetic analysis, continue to Ansys Electronics, CST Studio Suite, or Altair Flux according to the field and frequency regime.

For design-stage simulation, use Ansys Discovery or Altair Inspire.

For geometry preparation before simulation, continue to Ansys SpaceClaim.

If you need to inspect the full store inventory instead of choosing by physics, browse all software.

For unusual solver, hardware, integration or historical-version requirements, contact ProSoftStore before purchasing.