HVAC CFD Preprocessing in 15 Minutes, Not 4 Hours

Automated OpenFOAM preprocessing for office diffuser placement and server room cooling. Upload geometry → download simulation-ready results.

Built by Jianou Jiang, PhD from Oxford University (ML + CFD)

See How It Works Early Access: £39/month

Before & After FlowPrep

Manual HVAC CFD Workflow (The Way You Do It Now)

1. Export Revit model to STL

30 min

"Geometry cleanup in Rhino, fix holes..."

2. Import to ANSYS/OpenFOAM

45 min

"Mesh fails 3 times, adjust parameters..."

3. Set boundary conditions

60 min

"Diffuser velocities, wall temps, occupancy..."

4. Run simulation overnight

90 min

"Check convergence, adjust, re-run..."

5. Post-process in ParaView

45 min

"Extract PMV, make velocity plots..."

TOTAL: 4-6 hours

(spread over 2 days)

With FlowPrep AI (15 Minutes Total)

1. Upload STL file

1 min

FlowPrep: Auto geometry validation

2. Select scenario

10 sec

FlowPrep: Pre-configured for offices/servers

3. Auto-processing

12 min

FlowPrep: Template BCs, auto mesh

4. Email notification

0 min

FlowPrep: Auto convergence check

5. Download results

2 min

FlowPrep: Pre-made VTK + PNG + PDF

TOTAL: 15 minutes

(same day results)

How FlowPrep Works: 3 Steps

1

Upload Your Geometry

[Screenshot: Drag-drop interface with STL file upload]
Founder will add screenshot Week 2

  • → Upload office STL from Revit (max 50 MB)
  • → FlowPrep validates geometry (auto-detects holes)
  • → Takes 30 seconds
2

FlowPrep Runs OpenFOAM (You Do Nothing)

[Screenshot: Processing status with progress bar]
Founder will add screenshot Week 2

  • → Auto-meshing with snappyHexMesh
  • → Boundary conditions for ceiling diffusers
  • → SimpleFoam solver (1000 iterations)
  • → Email notification when ready (12 min average)
3

Download Results for ParaView or Reports

[Screenshot: Results page with 3 visualization thumbnails]
Founder will add screenshot Week 2

  • → Velocity field (VTK for ParaView)
  • → Temperature distribution (VTK)
  • → PMV thermal comfort (PNG heatmap)
  • → Summary: "78% of space achieves PMV ±0.5"
  • → PDF report ready for client deliverable

ANSYS Validation

FlowPrep results validated against ANSYS Fluent for 5 standard office geometries. Average difference: ±8% for velocity fields, ±6% for temperature.

Full validation study (PDF) — Available Week 4

FlowPrep is in beta. Always verify critical results with commercial software if required for stamped engineering deliverables.

Built by an Engineer, For Engineers

[Founder Photo]
Professional headshot
(to be added)

Hi, I'm Jianou Jiang. I have a PhD from Oxford University, researching ML applications in computational fluid dynamics.

I built FlowPrep because I was frustrated watching HVAC engineers spend 80% of their CFD time on repetitive preprocessing instead of analyzing results.

FlowPrep uses the same OpenFOAM solver you trust, with automated meshing templates trained on 50+ real office building geometries.

Technical Background:

  • • PhD Research: ML-enhanced CFD meshing
  • • PhD from Oxford University — ML-enhanced CFD
  • • Tools: OpenFOAM, PyFoam, Python, ML pipelines

Validation Methodology:

  • • Tested FlowPrep vs ANSYS Fluent on 5 office cases
  • • Mesh quality: Max skewness <0.4, non-orthogonality <70
  • • Results accuracy: Velocity ±8%, Temperature ±6%
  • • Full study available: Download PDF (Week 4)

Early Access Pricing (Beta)

£39 /month

50% off the £79 launch price — locked in for early adopters, even after beta ends

What's Included:

  • Unlimited office diffuser simulations
  • Unlimited server room cooling simulations
  • VTK, PNG, and PDF result exports
  • Email support (24-hour response time)
  • Beta access to new scenarios as they launch

No contract. Cancel anytime.

ROI Math:

  • • Your time: ~£150/hour (loaded cost for PE engineer)
  • • FlowPrep saves: 10+ hours/month
  • • Value: £1,500/month
  • • Cost: £39/month
  • • Payback: First simulation
Get Early Access (£39/month) →

✓ Stripe secure payment

✓ No credit card stored by FlowPrep (Stripe handles billing)

✓ Email confirmation within 24 hours with setup instructions

Frequently Asked Questions

What HVAC scenarios are supported in beta?

Currently: Office diffuser placement and server room cooling. More scenarios (atriums, labs, cleanrooms) coming in Q2 2026 based on user requests.

Does FlowPrep work with Revit geometry exports?

Yes. Export your Revit model to STL format (File > Export > CAD Formats > STL). FlowPrep accepts STL files up to 50 MB. Tutorial video coming Week 3.

What if FlowPrep results don't match my ANSYS?

FlowPrep uses OpenFOAM, not ANSYS, so minor differences are expected (±8% typical). If you see >15% difference, email the founder with your geometry for manual debugging. FlowPrep is beta — always verify critical results with commercial tools.

How do I get support if a simulation fails?

Email jianou.works@gmail.com. Response within 24 hours (usually same day). For geometry issues, send your STL file for personal troubleshooting.

Can I use FlowPrep results in stamped deliverables?

FlowPrep is in beta. Recommended use: initial design exploration, then verify final results with ANSYS/commercial software before stamping. As FlowPrep matures, validation data will improve to support stamped work.

What file formats do you support?

Currently: STL only (max 50 MB). STEP and IGES coming in Q2 2026. Export from Revit, Rhino, SketchUp, or any CAD tool to STL format.

Can I customize boundary conditions?

Not in beta. FlowPrep uses pre-configured templates (ceiling diffusers, server racks). Custom BC editing coming in full release (Q3 2026). For now, edit the exported OpenFOAM case files manually if needed.

Ready to Get 6 Hours Back This Week?

Join HVAC engineers already using FlowPrep to ship CFD reports faster.

Start Early Access (£39/month) →

Immediate access after payment. No credit card stored by FlowPrep.