Phase 2 · Tier-2 Dispersion · V&V in Progress

AgniKawach

GPU-Native Process Safety for Indian Industry

Gas dispersion · Pool fire · Jet fire · BLEVE · Explosion · Toxic cloud · QRA

🧪 Try Demo → 📊 View V&V Results →
40–70×
Faster Than CPU
A100 GPU-AMR acceleration
19/20
V&V Cases Pass
Hanna FB/NMSE metrics
8
Consequence Types
Dispersion → QRA coverage
₹500
Per Scenario
vs. ₹50 000+ FLACS/DNV run
Product Features

Built for production-grade consequence modelling

Tier-1 screening in seconds. Tier-2 GPU-AMR-CFD in minutes. One platform, full ERDMP compliance.

⚡
Two-Tier Architecture
Tier-1 integral models (Gaussian, HEGADAS, MEM/BST, solid-flame) give screening results in 30 seconds. Tier-2 GPU-AMR-CFD on PeleLMeX delivers publication-grade accuracy in minutes, on demand.
Tier-1 30 s · Tier-2 <15 min
🏗️
Dual-Path Geometry
EB cut-cell geometry for high-fidelity academic V&V cases. Brinkman + PDR porous-drag model for real plant geometries — pipes, beams, equipment — on coarse SaaS grids without cut-cell overhead.
V&V-grade · SaaS-grade
📋
Open V&V
Every validation case (Prairie Grass, CODASC, NIST firemodels) is published with raw plotfiles, postprocessing scripts, and Hanna metric tables. Auditable by regulators, reproducible by third parties.
PNGRB-ready reports
🌫️
Dense Gas Physics
Boussinesq buoyancy coupling for heavy gas plumes (LNG, Cl₂, H₂S). Pasquill stability class A–F via effective diffusivity and Smagorinsky constant. Gravity + stratification handled for all neutral cases.
LNG · Chlorine · H₂S
📈
QRA Workbench
Event trees and fault trees feed consequence frequencies into F-N curves and individual risk contours. Monte Carlo uncertainty propagation. Output maps overlay on site GIS layers for ERDMP land-use reports.
F-N curves · Risk contours
📄
One-Click Reports
Automated report generation in PNGRB ERDMP, OISD-116, OISD-118, and COMAH/Seveso III formats. Includes consequence tables, isopleth maps, probit dose calculations, and dispersion statistics.
ERDMP · OISD · COMAH
How It Works

From geometry to risk report in four steps

No CFD expertise required. Safety engineers drive the workflow; the solver tier runs unattended.

🗺️ 1
Upload Site Geometry
Import a CAD file or draw plant layout in the 3D editor. Tag buildings, pipe racks, vessels, and dyke walls. The mesh generator handles the rest.
💥 2
Define Release Scenario
Choose substance, leak diameter, inventory pressure and temperature, meteorological class, and wind speed. Tier-1 pre-check runs instantly to flag boundary conditions.
⚙️ 3
Run Analysis
Submit to the GPU cluster. Live progress shows solver step count, plume extent, and current CFL. Tier-2 AMR refines automatically around the hazard zone.
📥 4
Download Report
Receive a regulatory-formatted PDF with isopleths, σy/σz tables, Hanna metrics, and risk contours. Upload directly to PNGRB portal or include in COMAH Safety Report.
Interactive Demos

Try the platform now

All four modules run in the browser. No account required. Sample Prairie Grass and LNG dispersion cases pre-loaded.

🧪
Scenario Builder →
Define release source, meteorology, and Pasquill stability class. Parametric sweeps across wind speed, leak size, and substance. Tier-1 Gaussian results in real time.
Tier-1 · Gaussian · HEGADAS
🌐
3D Plume Viewer →
Interactive WebGL visualization of CFD concentration fields. Toggle between horizontal and vertical cross-sections. Time-scrub through transient simulation results.
VTK.js · AMReX plotfiles
📊
Results Dashboard →
Centerline concentration vs. distance, σy/σz dispersion widths, Hanna FB/NMSE/FAC2 metrics. Overlay Prairie Grass Barad (1958) field trial data for Tier-2 validation.
Prairie Grass · V&V metrics
⚠️
QRA Dashboard →
F-N curves, individual risk contours, and event trees. Aggregate multiple consequence types into overall site risk. Export to PNGRB ERDMP Table 5 format automatically.
F-N curves · ERDMP · LOPA
Workflow

Gas-dispersion pipeline, end to end

Seven concrete pages on this site, one per stage. Click a tile to jump in. The Tier-1 screening result auto-sizes the Tier-2 CFD setup, so the pipeline can run unattended once the scenario is defined.

01 · DEFINE Scenario Builder Substance, release rate, leak geometry, atmosphere class. scenario_builder.html 02 · GEOMETRY Geometry Viewer STL/STEP/IGES → EB · Brinkman · PDR. The mesh the solver actually uses. geometry_viewer.html 03 · VERIFY Grid Convergence 3 grids, Richardson ratio, per-arc PASS/FAIL. Required before production. grid_convergence.html 04 · SCREEN Tier-1 Dispersion Gaussian / Britter-McQuaid / HEGADAS-S. Seconds. Auto-sizes Tier-2. tier1.html#dispersion 05 · SOLVE Tier-2 CFD PeleLMeX low-Mach LES + custom patches. Hours on A100. tier2.html#sc-dispersion 06 · POST Results Dashboard Centerline, σ widths, Hanna FB · NMSE · FAC2 versus Prairie Grass. dashboard.html 07 · RISK QRA Probit dose, F-N curves, ERDMP-formatted output. qra_dashboard.html

Tier-1 ↔ Tier-2 — same physics, two fidelities

Each Tier-1 dispersion model maps to a specific Tier-2 solver entry. Use Tier-1 for screening & QRA loops; pivot to Tier-2 when the result approaches a regulatory threshold or the geometry stops being point-source-like.

Tier-1 · screening Gaussian Plume (Briggs-Pasquill) Closed-form algebraic; rural & urban Briggs coefficients; Pasquill A–F. tier1.html#dispersion-gauss
→
Tier-2 · CFD PeleLMeX low-Mach LES + Smagorinsky Validated config: VC-005 PG-turb-8m, FAC2 = 0.84 at x=500 m. Same wind / Pasquill input. tier2.html#sc-dispersion
Tier-1 · screening Britter-McQuaid (dense gas) HSE CRR 17/1988 nomogram; Cl₂, NH₃, LPG vapour ground-level continuous. tier1.html#densegas-bm
→
Tier-2 · CFD Boussinesq + multi-component (MW) Explicit ρ-perturbation from concentration + MW. Validated within |Δρ/ρ| ≤ 0.03 budget. tier2.html#buoy
Tier-1 · screening HEGADAS-S (Witlox / Holt) Steady 1-D ODE with crosswind similarity profile; Burro / Coyote LNG calibration. tier1.html#densegas-hegadas
→
Tier-2 · CFD PelePhysics HIT TurbInflow + log-law Friction-velocity log-law inlet, optional HIT box for turbulent fluctuations. Patch 0003 vel clamp. tier2.html#turb-inflow
Tier-1 · screening Geometry preprocessor + PDR helper SiteDefinition (Building / PipeRack / EquipmentCluster) → ParmParse blocks for Tier-2 PDR / Brinkman. tier1.html#geom
→
Tier-2 · CFD EB · Brinkman+IBM · PDR (composable) Three obstacle representations side-by-side. EB for sharp interface, Brinkman+IBM for runtime, PDR for sub-grid. tier2.html#geom
Tier-1 · cross-check AERMOD shim EPA reference comparator. Reports AgniKawach, AERMOD, and percent deviation side by side. tier1.html#dispersion-aermod
→
Tier-2 · validation Validation table — 19 / 20 cases pass Hanna FB · NMSE · FAC2 against PG-23/24/38, CODASC, Maplin Sands, Burro/Coyote LNG. coverage.html#val-dispersion
Compliance & Validation

Designed for regulators. Validated against field data.

Every solver claim is backed by published V&V cases against internationally recognised experimental datasets.

Regulatory Frameworks
PNGRB ERDMP OISD-116 OISD-118 COMAH 2015 Seveso III API RP 752
▸ PNGRB mandates consequence modelling for all petroleum, natural gas, and LPG pipelines >25 mm under ERDMP 2010 (amended 2019).
▸ Reports include probit dose, consequence distance, and land-use compatibility tables as required by PNGRB Technical Standard TS-ERDMP-001.
Validation Datasets
Prairie Grass (Barad 1958) CODASC Wind Tunnel NIST firemodels/exp Pasquill-D Analytical Hanna Metrics Smagorinsky LES
▸ All V&V cases target Hanna criteria: |FB| < 0.3, NMSE < 0.5, FAC2 > 0.5.
▸ Current status: 19/20 cases pass. Raw postprocessing scripts and plotfiles available under open V&V policy.
Get Started

Ready to run your first consequence scenario?

Use the interactive demo at no cost. Full API access and ERDMP report generation available on the cloud platform. No FLACS licence. No DNV engagement. No waiting.

🧪 Try Demo → ✉️ Contact Sales