- The Exam at a Glance
- CSWP-FS vs CSWP-Flow: Same Credential, Two Labels
- The 11 Topics in Cheat-Sheet Form
- Flow Physics Rules You Must Not Fumble
- Mesh Size, Solver Time and Result Sanity
- Workflow Habits: Units, Configurations, Duplicated Studies
- Logistics, Fees and Retake Rules
- A Domain-Ordered Review Sequence
- Who Values This Credential
- Frequently Asked Questions
- The exam is 13 hands-on questions in 90 minutes, with a minimum passing grade of 70%.
- The issuer lists 11 unweighted topics, so study every one rather than guessing which carries more points.
- The fee is US$49 per attempt in the North American catalog, excluding software and training.
- Retakes require at least 14 days and another exam credit; the online timer cannot be paused.
The Exam at a Glance
The Certified SOLIDWORKS Professional - Flow Simulation exam is practical, not recall-based. You open SOLIDWORKS, build and run fluid-flow studies, read results out of the solver, and demonstrate a basic understanding of the finite volume method that underlies the software. If you have only studied terminology, this format will feel unforgiving. If you have run dozens of studies, it will feel like a timed version of daily work.
| Item | What to remember |
|---|---|
| Issuer | SOLIDWORKS, Dassault Systemes |
| Questions | 13 hands-on questions |
| Time limit | 90 minutes, timer cannot be paused |
| Passing grade | Minimum 70% |
| Delivery | Tangix/VirtualTester; current instructions use the VirtualTester Web Client |
| Fee | US$49 for one attempt (North American catalog), excluding software and training |
| Software | SOLIDWORKS Standard with Flow Simulation 2018 or later, or Student Edition 2018 or later, per the exact exam page |
| Prerequisite certification | None imposed for Professional exams by the general certification FAQ |
| Validity | Per the issuer's 2020 Q&A, customer and student certifications do not expire |
Two quick arithmetic reminders. Thirteen questions in 90 minutes averages a little under seven minutes each, but hands-on CFD tasks are uneven: a unit-conversion check may take two minutes while a conjugate heat transfer setup can consume fifteen. And 70% is the passing score, not a pass rate. For a sober look at what is and is not known about outcomes, see CSWP-FS Pass Rate 2026: What the Data Shows, and for the score mechanics read CSWP-FS Passing Score 2026: Exactly What You Need to Pass.
CSWP-FS vs CSWP-Flow: Same Credential, Two Labels
Search results can be confusing because the issuer's public designation for this exam is SOLIDWORKS Flow Simulation Professional, CSWP-Flow. On this site, "CSWP-FS" refers to that same Certified SOLIDWORKS Professional - Flow Simulation credential. When you browse the official SOLIDWORKS exam page, look for the CSWP-Flow name; when you read our material, the abbreviation CSWP-FS points to the same exam.
Also keep it distinct from the structural side of the product family. Flow Simulation solves fluid dynamics and thermal problems; it is not the structural simulation exam. Candidates who blur the two tend to reach for stress, displacement and factor-of-safety thinking when the question asks about pressure drop, velocity fields or heat transfer.
The 11 Topics in Cheat-Sheet Form
The issuer publishes 11 included topics. The page describes what the exam covers; it does not publish a percentage-weighted blueprint, so do not assume that earlier or longer-sounding topics count more. The list below is the one-page version. For deeper treatment, use CSWP-FS Exam Domains 2026: Complete Guide to All 11 Content Areas.
1. Liquids and gas
Know how to choose and define the working fluid for a study.
- Be able to pick the fluid type and confirm it matches the physical problem.
- Understand why a gas and a liquid behave differently in the same geometry.
2. Internal and external flow simulations
This is the foundational fork in nearly every project.
- Internal: flow confined by walls, such as a pipe or manifold, which requires closed geometry via lids.
- External: flow around a body, such as air over a vehicle component, which relies on a computational domain around the part.
3. Internal systems involving multiple inlets or outlets
Practice assigning boundary conditions to several openings at once.
- Decide which openings receive flow or pressure conditions and which are left to respond.
- Check that your combination of conditions is physically solvable.
4. Mixing of various fluids
Expect scenarios where more than one fluid enters a system.
- Understand how multiple inlet fluids are defined and tracked through the model.
- Be ready to read out a mixed result at an outlet or in a region.
5. Conjugated heat transfer
Heat moves through solids and fluids in the same study.
- Assign solid materials and heat sources correctly.
- Interpret temperatures in solids versus the surrounding fluid.
6. Natural and forced convection
Know what drives the flow.
- Forced: fans, pumps and imposed boundary flow.
- Natural: buoyancy driven by temperature differences, which depends on gravity being enabled in the study.
7. Extracting results such as force, velocity, or pressure
The exam rewards precise extraction, not just attractive plots.
- Know how to obtain a numeric value on a surface or at a point and report it in the requested unit.
- Match the quantity requested to the right goal or result tool.
8. Working with various units
Unit handling is a recurring source of silent errors.
- Verify the unit system before reading any number.
- Convert deliberately when a question asks for a different unit than the project uses.
9. Working with configurations
Geometry variations drive study variations.
- Understand how studies are tied to configurations.
- Know what changes when you switch configuration and re-run.
10. Duplicating and editing studies
Efficiency matters under a 90-minute clock.
- Clone a working study, edit the changed condition, and re-solve rather than rebuilding from zero.
- Confirm which inputs carried over and which need to be revisited.
11. Controlling mesh size
Mesh settings influence accuracy and solver time.
- Know the global and local controls available.
- Be able to refine where gradients are steep without exploding run time.
Flow Physics Rules You Must Not Fumble
Internal versus external: the first decision
Before touching a boundary condition, classify the problem. An internal study needs a sealed fluid region, so openings must be capped with lids so the software can identify the fluid volume. An external study uses a computational domain surrounding the object; the size of that domain affects whether the flow field has room to develop. Misclassifying the problem usually produces an immediate error message or a result that looks plausible but answers a different question.
Boundary conditions with multiple openings
Domain 3 is where candidates lose the most time. A well-posed internal flow generally needs the openings to be specified in a consistent combination. The practical rule: think about what is known physically (a flow rate from a pump, a pressure from a tank, an open outlet to atmosphere) and assign the condition that represents that knowledge. Do not assign conditions that over-constrain the system just because every opening "feels" like it needs one. When the solver complains, read the message before changing anything; the fix is often a single opening's condition type.
Fluid mixing and heat transfer
When two fluids meet, the setup question becomes how each fluid enters and how you will read the blended result. For heat transfer, separate the physics into three pieces: where heat is generated, how it conducts through solids, and how the fluid carries it away. Conjugated heat transfer means solids and fluids exchange heat in the same study, so material assignment for the solids is not optional. Natural convection adds one more requirement: gravity must be accounted for, because buoyancy is the engine of the flow.
Mesh Size, Solver Time and Result Sanity
Mesh control is one of the 11 listed topics, but it also quietly affects every other topic. A coarse mesh can produce a fast but misleading result; an overly fine mesh can consume the time you need for later questions. The balance is a judgment call, and the exam environment makes that judgment visible.
- Start with the default, then justify changes. Refine only when a question's required precision or a thin geometric feature demands it.
- Refine locally where it matters. Small channels, narrow gaps and regions of rapid change are the usual candidates.
- Watch solver time. More cells mean longer runs. If you have 90 minutes across 13 questions, an unnecessary fine mesh is a time budget problem, not just a quality choice.
- Sanity-check outputs. Before reporting a number, ask whether the magnitude, sign and unit make physical sense. A negative pressure drop or a temperature below the coldest boundary is a flag to revisit the setup.
Key Takeaway
Treat mesh refinement as a trade you consciously make. Practice running the same study at two mesh levels and note how the result and run time change. That comparison builds the instinct the exam quietly tests.
The exam also expects a basic understanding of the finite volume method. You do not need to derive equations, but you should be comfortable with the idea that the domain is divided into cells, conservation is applied across each cell, and the solver iterates toward a converged solution. That conceptual footing helps you explain why mesh and convergence matter instead of treating them as arbitrary settings.
Workflow Habits: Units, Configurations, Duplicated Studies
Three of the 11 topics are really about workflow discipline rather than physics: working with various units, working with configurations, and duplicating and editing studies. They are easy to underestimate because they are not conceptually deep, but they are where time disappears on exam day.
- Check units first. Confirm the project unit system before entering values or reading results. When a question asks for a specific unit, convert at the end and state the value in that unit.
- Know your configuration. Before running anything, confirm which configuration is active. Changing geometry in the wrong configuration can invalidate the study you thought you were editing.
- Duplicate before you experiment. Cloning an existing study to test a change preserves a known-good baseline. Then edit only what the question changes.
- Re-verify inherited settings. After duplicating, spot-check boundary conditions, goals and mesh settings so nothing carried over incorrectly.
If you want a realistic read on how these skills affect difficulty, How Hard Is the CSWP-FS Exam? Complete Difficulty Guide 2026 walks through where candidates typically feel pressure.
Logistics, Fees and Retake Rules
| Topic | Cheat-sheet fact |
|---|---|
| Exam fee | US$49 for one attempt in the North American catalog |
| What the fee excludes | Software licenses and training courses |
| Testing platform | Tangix/VirtualTester; follow the current VirtualTester Web Client instructions rather than legacy TesterPRO references |
| Your responsibilities | Compatible licensed software and Internet access |
| Timer | 90 minutes, cannot be paused |
| Retake | At least 14 days after an attempt, plus another CSWP-Flow exam credit |
| Preparation recommended by the issuer | SOLIDWORKS Flow Simulation course and Learning Path |
Budget the exam credit separately from the software and any training. Many candidates already have a license through work or school, which keeps the incremental cost low, but training is a distinct line item. The two-day training course is a preparation option, not a mandatory training-hours requirement and not related to the 90-minute exam timer. For a full cost picture, see CSWP-FS Certification Cost 2026: Complete Pricing Breakdown; for eligibility details, CSWP-FS Requirements 2026: Eligibility, Prerequisites & How to Qualify.
A Domain-Ordered Review Sequence
Because the topics are unweighted, a sensible plan is to cover all 11 and spend extra time where your hands-on experience is thinnest. The sequence below groups them so each stage builds on the last. It is a template, not an official schedule; adjust it to your starting point. For a broader preparation framework, see CSWP-FS Study Guide 2026: How to Pass on Your First Attempt.
Foundations
- Liquids and gas, internal and external flow setup
- Build three small studies from scratch, including one with lids
Boundary conditions and mixing
- Multiple inlets and outlets, fluid mixing
- Deliberately trigger and read solver error messages
Thermal and convection
- Conjugated heat transfer, natural and forced convection
- Compare a buoyancy-driven study with a fan-driven one
Results, workflow and mesh
- Extract force, velocity and pressure; practice unit changes
- Configurations, duplicated studies, mesh control, then a timed 90-minute mock session
To add timed repetition on top of your own hands-on practice, try the questions on the main practice test site. Keep in mind that third-party question banks are not endorsed by the issuer, so use them to rehearse pacing and recall rather than as a promise of exam content.
Who Values This Credential
The certification speaks most clearly to people whose work involves fluid or thermal behavior: product design engineers checking cooling or flow paths, mechanical engineers validating pumps, valves and enclosures, and analysts who support design teams with CFD. Employers evaluating candidates tend to look for demonstrated project work alongside the credential, so pair the certificate with examples such as a documented heat-sink study or a manifold pressure-drop analysis.
Be cautious with any claim of a guaranteed pay increase. The value depends on your role, your industry and the projects you can show. To explore the market realistically, read CSWP-FS Jobs, CSWP-FS Salary Guide 2026: Complete Earnings Analysis, and Is the CSWP-FS Certification Worth It? Complete ROI Analysis 2026.
Frequently Asked Questions
The exam has 13 hands-on questions with a 90-minute time limit. The online timer cannot be paused, so plan your pacing before you start.
The minimum passing grade is 70%. That figure is the passing score, not a pass rate, and published population pass rates were not verified.
No weights are published. The issuer lists 11 included topics, and the page describes coverage rather than a percentage-weighted blueprint, so prepare across all of them.
The general certification FAQ imposes no prerequisite certification for Professional exams. The SOLIDWORKS Flow Simulation course and Learning Path are recommended preparation, not requirements.
Yes, after at least 14 days and with another CSWP-Flow exam credit. Use the waiting period to revisit the topics where your hands-on practice felt weakest.
For a broader introduction to the credential itself, start with What Is CSWP-FS?, and when you are ready to rehearse under timed conditions, return to the practice test platform.