- How to Read the 11 Exam Topics
- Exam Format and Logistics That Shape Every Domain
- Domains 1-3: Fluid Type, Flow Type, and Multiple Openings
- Domains 4-6: Mixing, Conjugated Heat Transfer, and Convection
- Domains 7-10: Results, Units, Configurations, and Studies
- Domain 11: Controlling Mesh Size
- One-Table Domain Map
- Sequencing the Domains in Your Prep
- Where the Skills Matter on the Job
- Frequently Asked Questions
- The exam lists 11 topics, unweighted; no percentage blueprint is published, so treat every domain as testable.
- You face 13 hands-on questions in 90 minutes, and the timer cannot be paused.
- A minimum passing grade of 70% applies; that is a score threshold, not a pass rate.
- Mesh control, units, and configurations are speed skills, so practice them until they are automatic.
How to Read the 11 Exam Topics
The Certified SOLIDWORKS Professional - Flow Simulation exam, which SOLIDWORKS publicly designates as SOLIDWORKS Flow Simulation Professional (CSWP-Flow), is described by the issuer as a list of included topics rather than a percentage-weighted blueprint. There are exactly 11 topics, and the issuer does not publish how many questions come from each. That matters for planning: you cannot responsibly skip a domain on the theory that it is "only worth a few points," because no such weighting has been published.
Candidates who also hold or are considering other SOLIDWORKS credentials sometimes ask how this one differs. The short version is that it is a fluid-flow exam, not a structural one. If you are weighing the two paths, the comparison of CSWP-Flow against the Simulation credential is a useful side study, and the broader What Is CSWP-FS? overview explains where this credential sits in the SOLIDWORKS ladder.
Because the 11 topics are unweighted, the best way to read them is by skill type. Some are physics-setup skills (fluid type, flow type, inlets and outlets, mixing, heat transfer, convection). Some are workflow skills (units, configurations, duplicating and editing studies, mesh size). One is an interpretation skill (extracting force, velocity, or pressure). The exam is hands-on, so all three types are exercised inside the same questions.
Exam Format and Logistics That Shape Every Domain
Before going domain by domain, the format constraints explain why certain topics deserve disproportionate practice time:
- 13 hands-on questions in 90 minutes. That is roughly seven minutes per question on average, and CFD studies take real solver time.
- Minimum passing grade of 70%. See CSWP-FS Passing Score 2026 for how that threshold plays out.
- Delivery through SOLIDWORKS with Tangix/VirtualTester. Current instructions use the VirtualTester Web Client, and the current browser-client instructions supersede legacy TesterPRO setup references you may find in older forum posts.
- The online timer cannot be paused. A solver run that you start without a plan is time you do not get back.
- You supply the software and the internet connection. The software minimum is SOLIDWORKS Standard with SOLIDWORKS Flow Simulation 2018 (or SOLIDWORKS Student Edition 2018) or later, as specified on the exact exam page.
The fee is US$49 for one attempt in the North American catalog, which excludes software and training. A retake needs at least 14 days between attempts and another CSWP-Flow exam credit. For the full budget picture, including what the fee does not cover, see CSWP-FS Certification Cost 2026. Eligibility is covered in CSWP-FS Requirements 2026; the general certification FAQ imposes no prerequisite certification for Professional exams, though the Flow Simulation course and Learning Path are recommended preparation.
One more fact to keep straight: the recommended two-day training course is a preparation resource. It is not the exam timer and not a mandatory training-hours requirement.
Domains 1-3: Fluid Type, Flow Type, and Multiple Openings
Domain 1: Liquids and gas
Every study begins with a fluid choice, and the exam expects you to make it correctly and quickly. You should be comfortable assigning a liquid or a gas from the engineering database and knowing what that choice implies for the rest of the setup.
- Know where fluids are selected in the Flow Simulation wizard and how to change them later.
- Understand that fluid properties feed directly into the numbers you extract later, so a wrong fluid silently corrupts every answer.
- Be ready to work with a single study that uses one fluid and with studies where the fluid choice is part of the task description.
Domain 2: Internal and external flow simulations
This is the foundational split in Flow Simulation. Internal flow is fluid moving through enclosed passages; external flow is fluid moving around a body in open space. The setup differs in ways the exam can probe directly.
- Internal studies require the model to be closed with lids over openings so the fluid has a defined domain.
- External studies rely on a computational domain around the body, and you should understand how its size relates to the solution.
- Recognize from a problem statement which type applies before touching any settings.
Domain 3: Internal systems involving multiple inlets or outlets
Real manifolds, mixers, and cooling circuits rarely have one inlet and one outlet. This topic is about assigning boundary conditions correctly across several openings.
- Distinguish inlet conditions (velocity, mass flow, volume flow) from outlet conditions (environment pressure, static pressure).
- Understand that over-specifying or conflicting boundary conditions is a classic source of a study that will not run or gives nonsense.
- Practice reading which opening is which from geometry and the problem text.
These three domains are the entry gate to nearly every question. If you misread internal versus external, or place the wrong boundary condition on an opening, the downstream steps cannot rescue the answer. The deeper boundary-condition logic is also a theme in CSWP-FS Study Guide 2026.
Domains 4-6: Mixing, Conjugated Heat Transfer, and Convection
Domain 4: Mixing of various fluids
Some problems involve more than one fluid entering a domain and combining. The exam tests whether you can set up the study so each fluid is represented and the mixed result can be evaluated.
- Understand how multiple fluids are defined and how each inlet is tied to its fluid.
- Be prepared to extract a mixed quantity at an outlet or in a cut plot.
- Watch for the interaction between mixing setup and mesh resolution near the mixing zone.
Domain 5: Conjugated heat transfer
Conjugated heat transfer means heat conduction in solids coupled to heat carried by the fluid. In practice, this is where electronics cooling and heat-exchanger style problems live.
- Know how to enable heat conduction in solids and assign solid materials.
- Understand how a heat source is defined, by power or by temperature, and where it is applied.
- Be able to read a solid temperature result and relate it back to the fluid flow.
Domain 6: Natural and forced convection
Forced convection is driven by a fan or imposed flow; natural convection is driven by buoyancy from temperature differences. The setup requirements are different and the exam can test whether you know it.
- Natural convection depends on gravity being enabled and on temperature differences driving the motion.
- Forced convection depends on defined inlet or fan conditions.
- Choose the correct treatment from the problem statement rather than defaulting to one.
Domains 7-10: Results, Units, Configurations, and Studies
These four topics are where speed and hygiene decide the score. They are less glamorous than the physics, but they are in the exam because real engineering work depends on them.
Domain 7: Extracting results such as force, velocity, or pressure
Running a study is only half the task; the question usually asks for a number. You need to know how to pull a force on a face, a velocity at a point or plane, or a pressure at a location or as an average, and you need to know the difference between a goal you set before solving and a result you pull afterward.
- Set goals (surface, volume, point, or equation goals) before the run when the problem calls for a specific quantity.
- Use result tools such as cut plots, surface plots, and XY plots to inspect behavior, and use goal values for the number you report.
- Read the units on the answer; a correct magnitude in the wrong unit is still wrong.
Domain 8: Working with various units
Problem statements may mix unit systems, and the exam can ask for answers in a different unit than the model uses. Set the unit system deliberately at the start, know how to change display units for results, and double-check conversions.
Domain 9: Working with configurations
Flow Simulation studies are tied to SOLIDWORKS configurations. A question may have you evaluate a design variant, which means switching or creating configurations and understanding how studies attach to them. Knowing what carries over and what does not is the point of this topic.
Domain 10: Duplicating and editing studies
Cloning an existing study and modifying one parameter is faster than rebuilding from scratch, and the exam rewards that efficiency. Know how to clone a project, change a boundary condition or goal, and rerun it without disturbing the original.
Key Takeaway
Domains 8-10 reward workflow discipline. Practice cloning a finished study, changing one input, and re-extracting the result against a clock. That single loop touches units, configurations, duplication, and results extraction together.
Domain 11: Controlling Mesh Size
Mesh control ties accuracy to time. A finer mesh generally improves resolution but lengthens the solver run, and with a 90-minute timer that cannot be paused, that trade-off is a strategic decision, not just a technical one.
Domain 11: Controlling mesh size
You are expected to adjust the mesh so the study resolves the physics that matter without running out the clock.
- Understand global mesh settings versus local refinement in regions of interest, such as small passages or boundary layers near heated parts.
- Know how minimum gap size and minimum wall thickness settings relate to small geometry features.
- Connect mesh size to result interpretation: a coarse mesh can hide a feature, and an over-fine mesh can leave no time to finish other questions.
- Have a habit of checking the mesh before solving so you do not discover a poor resolution only after a long run.
The exam description also notes that candidates should demonstrate basic finite-volume-method understanding. You do not need to derive the method, but you should understand why cell size affects the result and why a converged answer is different from a merely finished run. That conceptual grounding makes mesh decisions defensible rather than guesswork. For a candid look at which parts trip people up, read How Hard Is the CSWP-FS Exam?
One-Table Domain Map
Use this table to see each topic by skill type and the most common way candidates lose points. No weights are implied, because none are published.
| Domain | Skill type | Typical failure point |
|---|---|---|
| 1. Liquids and gas | Setup | Wrong fluid carried into the study |
| 2. Internal and external flow | Setup | Misclassifying the problem type |
| 3. Multiple inlets or outlets | Setup | Conflicting or misplaced boundary conditions |
| 4. Mixing of various fluids | Setup | Fluids not tied to the correct openings |
| 5. Conjugated heat transfer | Setup | Solid conduction or heat source not enabled |
| 6. Natural and forced convection | Setup | Gravity or flow driver missing |
| 7. Extracting force, velocity, pressure | Interpretation | Goal not set, or wrong quantity reported |
| 8. Various units | Workflow | Correct number, wrong unit |
| 9. Configurations | Workflow | Study not matched to the intended configuration |
| 10. Duplicating and editing studies | Workflow | Editing the original instead of a clone |
| 11. Controlling mesh size | Setup and time management | Mesh too coarse to resolve, or too fine to finish |
Sequencing the Domains in Your Prep
This is the one place where study planning matters, and it is tied directly to how the domains build on each other. Start with the setup spine, add physics layers, then drill workflow speed. A sample four-week order:
Flow fundamentals
- Domains 1-3: fluids, internal versus external, and multiple inlets or outlets
- Build several simple internal studies with two or three openings
Added physics
- Domains 4-6: mixing, conjugated heat transfer, natural and forced convection
- Run one heated-solid study each with forced and natural convection
Results and workflow
- Domains 7-10: goals and result extraction, unit changes, configurations, cloned studies
- Time yourself cloning a study and re-extracting a result
Mesh and full runs
- Domain 11: refinement strategy against solver time
- Complete timed 13-question style sets under a 90-minute limit using our practice tests
If you only have a few days, prioritize the cross-cutting loop (clone, edit, solve, extract) over reading about any single domain. For a compressed review sheet, see the CSWP-FS Cheat Sheet 2026.
Where the Skills Matter on the Job
The 11 topics map closely to real design analysis tasks: sizing flow paths, checking pressure drop, verifying thermal behavior of enclosures, and comparing design variants. Roles that use this work include mechanical design engineers, thermal and fluid analysts, product development engineers, and technical consultants or application engineers who support SOLIDWORKS users. Whether the credential changes your prospects depends on the role and on the project evidence you can show alongside it; no guaranteed certification premium exists, and this site does not claim one. For a measured view, see Is the CSWP-FS Certification Worth It? and the CSWP-FS Jobs overview.
On durability, the issuer's 2020 Certification Program Q&A states that customer and student certifications do not expire, so the credential does not carry a renewal cycle based on that source.
Frequently Asked Questions
The issuer lists 11 included topics: liquids and gas; internal and external flow; multiple inlets or outlets; mixing of fluids; conjugated heat transfer; natural and forced convection; extracting results; various units; configurations; duplicating and editing studies; and controlling mesh size. They are unweighted, so no percentage split is published.
It is a hands-on exam with 13 questions in 90 minutes, delivered through SOLIDWORKS with Tangix/VirtualTester using the VirtualTester Web Client. The minimum passing grade is 70%, and the timer cannot be paused.
The North American catalog lists US$49 for one attempt, excluding software and training. A retake requires at least 14 days and another CSWP-Flow exam credit. Details are in the cost breakdown.
The general certification FAQ imposes no prerequisite certification for Professional exams. The Flow Simulation course and Learning Path are recommended preparation, not mandatory steps. See the requirements guide for specifics.
No. Seventy percent is the score you need to pass. Published population pass rates were not verified, so this site does not quote one. The pass rate article explains what can and cannot be said.