- What CSWP-FS Actually Refers To
- CSWP-FS vs. CSWP-Flow: Reconciling the Names
- Exam Format, Fee and Delivery
- The 11 Topics, Explained as Real CFD Tasks
- Flow Simulation vs. Structural Simulation
- Mesh Size, Solver Time and Result Interpretation
- Who Benefits From the Credential
- Preparing: Sequencing the Topics
- Budgeting: Exam Credit vs. Software vs. Training
- Frequently Asked Questions
- CSWP-FS here means Certified SOLIDWORKS Professional - Flow Simulation, issued by SOLIDWORKS (Dassault Systemes); the issuer's public name is CSWP-Flow.
- The exam has 13 hands-on questions in 90 minutes, and you need at least 70% to pass.
- The issuer lists 11 unweighted topics, from liquids and gas to controlling mesh size.
- The North American fee is US$49 per attempt, excluding software and training; retakes need 14 days and another exam credit.
What CSWP-FS Actually Refers To
CSWP-FS stands for Certified SOLIDWORKS Professional - Flow Simulation. It is a professional-level, performance-based credential from SOLIDWORKS, a Dassault Systemes brand. It verifies that you can set up and run fluid-flow studies in SOLIDWORKS Flow Simulation, interpret what the solver gives back, and demonstrate a working understanding of the finite volume method that sits underneath the software.
It is not a theory test about fluid mechanics in the abstract. It is a hands-on exam in which you open SOLIDWORKS models, configure studies, run them and report numbers. If you want the broader picture of the credential's naming and meaning, see our companion pieces on what CSWP-FS stands for and the CSWP-FS certification.
CSWP-FS vs. CSWP-Flow: Reconciling the Names
Candidates often search for "CSWP-FS" and "CSWP-Flow" as if they were two products. They are the same credential under different labels. SOLIDWORKS' own public designation for this exam is SOLIDWORKS Flow Simulation Professional, CSWP-Flow. "CSWP-FS" is the shorthand many candidates, employers and training providers use, and it is the label this site uses.
This matters in practice for two reasons:
- Registration: When you look for the exam on the SOLIDWORKS certification pages or purchase an exam credit, the product is listed as CSWP-Flow.
- Searching for materials: Training catalogs, forum threads and study notes may use either label. Searching both terms gives you a fuller picture of what exists.
Do not confuse it with the structural-oriented professional exam. Comparing the two is a common question, and we cover how Flow Simulation differs from structural analysis below.
Exam Format, Fee and Delivery
The mechanics are straightforward, but a few details are easy to overlook.
| Item | What the issuer states |
|---|---|
| Question count | 13 hands-on questions |
| Time limit | 90 minutes; the online timer cannot be paused |
| Passing score | Minimum 70% |
| Fee (North American catalog) | US$49 for one attempt, excluding software and training |
| Testing platform | SOLIDWORKS through Tangix/VirtualTester; current instructions use the VirtualTester Web Client |
| Software | SOLIDWORKS Standard with SOLIDWORKS Flow Simulation 2018 or later, or SOLIDWORKS Student Edition 2018 or later, per the exact exam page |
| Retakes | At least 14 days between attempts, plus another CSWP-Flow exam credit |
| Prerequisite certification | None imposed by the general certification FAQ for Professional exams |
| Validity | Customer and student certifications do not expire (2020 Q&A) |
Two practical notes. First, you supply your own compatible licensed software and Internet access, so the exam fee is only one piece of the cost. Second, the current browser-client instructions supersede older TesterPRO setup references that still appear in some third-party write-ups, so follow the current SOLIDWORKS exam procedure rather than a legacy guide. For a detailed money breakdown, see CSWP-FS certification cost; for eligibility, see CSWP-FS requirements.
The 11 Topics, Explained as Real CFD Tasks
The issuer lists 11 exam topics. Importantly, the page describes included topics; it is not a percentage-weighted blueprint, so you should not assume that earlier topics carry more questions or that every topic is tested equally. Prepare for all of them. The full walk-through lives in our guide to all 11 CSWP-FS content areas; here is how each one translates into work you do at the keyboard.
1. Liquids and gas
You choose and configure the working fluid correctly before anything else.
- Know when a study involves liquids, gases or both, and how that affects the study setup.
- Verify fluid selection in the wizard rather than trusting defaults.
2. Internal and external flow simulations
Internal flow (fluid inside a part, like a manifold) and external flow (fluid around a body, like a vehicle shape) are set up differently.
- Internal studies require closed geometry, typically using lids to seal openings.
- External studies depend on a computational domain large enough to avoid boundary interference.
3. Internal systems involving multiple inlets or outlets
Real piping and manifold problems rarely have one in and one out.
- Assign boundary conditions to each opening consistently (for example, pressure at one, flow rate at another).
- Check that the combination of conditions is physically sensible and not over- or under-constrained.
4. Mixing of various fluids
Studies where more than one fluid enters the domain.
- Define each fluid and its inlet conditions.
- Read concentration or mixture results at the locations the question names.
5. Conjugated heat transfer
Heat moving between solids and fluids in the same model.
- Assign solid materials and heat sources, then enable heat conduction in solids.
- Pull out temperatures at specified components or surfaces.
6. Natural and forced convection
Buoyancy-driven flow versus fan- or pump-driven flow.
- Natural convection requires gravity to be set correctly; forced convection requires an imposed flow source.
- Recognize which regime a problem statement describes.
7. Extracting results such as force, velocity, or pressure
Most questions end here: you must report a number.
- Use goals, cut plots, surface and point parameters to read values precisely.
- Know which result tool answers which kind of question.
8. Working with various units
Unit systems are a quiet source of lost points.
- Set the unit system before entering values, and confirm the units on reported results.
- Convert carefully when a question mixes systems.
9. Working with configurations
Flow Simulation studies are tied to SOLIDWORKS configurations.
- Understand how a geometry change in a configuration affects the associated study.
- Switch configurations deliberately and re-run rather than assuming results carry over.
10. Duplicating and editing studies
Efficiency under a 90-minute clock.
- Clone an existing study and alter inputs instead of rebuilding from scratch.
- Know exactly which settings must be revisited after duplicating.
11. Controlling mesh size
Mesh settings govern accuracy, memory and run time.
- Adjust global and local mesh controls appropriately for the geometry.
- Connect mesh choices to how trustworthy a reported result is.
Flow Simulation vs. Structural Simulation
Many SOLIDWORKS users come from design or structural backgrounds and assume Flow Simulation works like stress analysis. It does not, and the exam assumes you understand the distinction.
- Domain: Structural simulation analyzes the solid body (stress, displacement). Flow Simulation analyzes the fluid, and, in conjugated heat transfer, the interplay between fluid and solid.
- Geometry thinking: In flow work, the fluid volume is what matters. For internal studies you often must close off the model with lids so the fluid region is well defined. A structural user rarely thinks this way.
- Boundary conditions: You apply pressures, flow rates, velocities and thermal conditions at openings, not fixtures and loads on solid faces.
- Verification mindset: A CFD result is only as good as its mesh and its boundary conditions, so interpretation is part of the skill.
If you are weighing this credential against the structural-side professional exam, our post on how hard the CSWP-FS exam is discusses where candidates from different backgrounds tend to struggle.
Mesh Size, Solver Time and Result Interpretation
The most distinctive tension in this exam is the one between accuracy and the clock. The 90-minute limit is real, and the timer cannot be paused, so solver time is a resource you manage.
- Finer mesh generally gives more resolved results but increases solve time and resource use.
- Coarser mesh solves faster but can miss features, particularly in narrow passages or thin walls.
- Local refinement lets you spend resolution where the physics demands it instead of everywhere.
The skill being tested is judgment: choose a mesh that is fine enough for the question being asked, start the solve early, and use waiting time productively (for example, preparing the next study). The exam also touches on basic finite-volume-method understanding, so be ready to explain in simple terms why cell size and convergence affect the answer you read off the plot.
Key Takeaway
Treat mesh and solver time as a budget. Before you press run on any question, decide what accuracy that specific answer needs, set the mesh to match, and queue the solve while you work on something else.
Who Benefits From the Credential
The CSWP-FS suits professionals whose work touches fluid or thermal behavior inside or around SOLIDWORKS-designed products. Typical profiles include:
- Mechanical design engineers who validate cooling, ducting, valves, manifolds or enclosures before prototyping.
- Product development engineers working on pumps, heat exchangers, electronics enclosures or HVAC-adjacent hardware.
- Simulation analysts and application engineers who support colleagues or customers using Flow Simulation.
- Students and early-career engineers who want a verifiable, hands-on credential to accompany project work.
On the career question, be realistic. A certification demonstrates verified skill; it does not guarantee a salary premium. Employers evaluating simulation candidates tend to weigh role requirements and demonstrable project evidence (models, studies, documented results) alongside the credential. We unpack this in the CSWP-FS salary guide, the ROI analysis and CSWP-FS jobs.
Preparing: Sequencing the Topics
SOLIDWORKS recommends the SOLIDWORKS Flow Simulation course and Learning Path as preparation. The training is a two-day course, but that is a curriculum length, not a required number of training hours, and it has no relationship to the 90-minute exam timer. The public course contents are a preparation outline, not an exhaustive exam blueprint, and the curriculum headings do not add topics to the 11 listed above.
Because the exam is hands-on, practice should be hands-on too. A sensible sequence builds from foundations to speed:
Foundations
- Fluids (liquids and gas), internal vs. external setup, units.
- Run simple single-inlet, single-outlet studies end to end.
Complex flow and heat
- Multiple inlets/outlets, fluid mixing, conjugated heat transfer.
- Natural vs. forced convection on the same model to feel the difference.
Workflow and results
- Configurations, duplicating and editing studies, mesh control.
- Practice extracting force, velocity and pressure repeatedly.
Timed rehearsal
- Full 13-question, 90-minute run-throughs under realistic conditions.
- Review every missed answer for a setup error vs. a reading error.
Build your own CFD problems rather than only reading about them: change a boundary condition, predict the result, run it, and compare. For a fuller plan, see the CSWP-FS study guide and the CSWP-FS cheat sheet. When you want exam-style repetition, our practice tests are designed around this hands-on, result-checking mindset rather than recall alone.
Budgeting: Exam Credit vs. Software vs. Training
It helps to separate three distinct costs that often get blended together:
- Exam credit: US$49 per attempt in the North American catalog. A retake needs another credit.
- Software: You must supply a compatible licensed SOLIDWORKS installation with Flow Simulation (or an eligible Student Edition), version 2018 or later per the exam page. Note that 2018 is a compatibility minimum, not an indication of which year the exam outline dates from; the live exam page is undated.
- Training: The recommended Flow Simulation course is optional preparation, priced separately and not included in the exam fee.
Because the exam fee is modest relative to software and training, the real planning question is access: make sure you have a licensed environment to practice in well before your attempt. Scheduling logistics are covered in CSWP-FS exam dates, and a cost-focused view is in our pricing breakdown. More on structured preparation options is at CSWP-FS training.
Frequently Asked Questions
Yes. CSWP-FS is the common shorthand for the credential SOLIDWORKS publicly names SOLIDWORKS Flow Simulation Professional, CSWP-Flow. It is the same exam, the same issuer and the same 11 topics.
The exam has 13 hands-on questions to be completed in 90 minutes, and the minimum passing grade is 70%. The timer cannot be paused once you begin.
The general SOLIDWORKS certification FAQ imposes no prerequisite certification for Professional exams. The Flow Simulation course and Learning Path are recommended preparation, not a formal requirement. See CSWP-FS requirements for details.
The North American catalog lists US$49 for one attempt, excluding software and training. If you need a retake, you must wait at least 14 days and purchase another CSWP-Flow exam credit.
According to SOLIDWORKS' 2020 Certification Program Q&A, customer and student certifications do not expire. Check the current certification program pages for any policy updates before relying on this for long-term planning.