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Research-Grade Combustion Engineering Tools

The Engine for
Combustion Research

Propulsion Engineering · Zero-Emission Simulation · Thermodynamic Research
A high-fidelity engine simulation suite that demystifies fluid dynamics, fuel chemistry, and combustion mathematics into real-time, browser-native interactive experiences.

Runs in your browser
Free account · no credit card
Peer-validated thermodynamics
Scroll to explore
0
Published combustion papers
0
Research citations
0
Years active in combustion R&D
0
Calibrated fuel models
Live · v1.3
// 01 — SIMULATION ENGINE

AgniCycle™ IC Engine
Simulator

An advanced transient 0D solver resolving temperature, pressure, cylinder volume, and exhaust emissions at 0.25° crank-angle intervals across all four strokes — exactly 2,881 discrete equations per cylinder, finishing in under 20 ms in your browser. No server. No compile. No wait.

  • Full 720° CA sweep (−360° to +360°) covering intake, compression, power, and exhaust
  • Three-Zone partitioning: unburned reactants, flame front, and burned products zones
  • Double-Wiebe mixed kinetics: premixed spark-ignition flame + diffusion spray combustion
  • First-Law energy partition: Qfuel = Wind + Qwall + Qexh + Qinc solved each step
  • 12+ calibrated fuel models: H₂, NH₃, DME, iso-octane, diesel, biodiesel, E85, and more
  • Livengood-Wu knock integral + Extended Zeldovich thermal NOx — cycle-accurate emissions
  • Researcher & Instructor modes — switch between deep research config and curriculum-preset layouts
agnicycle · cycle_simulator · diesel · 1500 rpm
agnicycle · spray_calculator · hiroyasu · iso-octane
Live · Beta
// 02 — SPRAY PHYSICS

Fuel Spray
Calculator

Characterize fuel injection sprays without a wind tunnel. Compute droplet size distributions, spray penetration, evaporation timescales, and cone angles using empirical correlations validated against high-speed Mie scattering experiments.

  • Sauter Mean Diameter (SMD) via Hiroyasu–Arai and Reitz–Diwakar correlations
  • Liquid jet penetration curves: intact length and tip penetration vs. time
  • Spray cone half-angle as a function of injection pressure and orifice geometry
  • Droplet evaporation model — D² law with fuel vapor pressure correction
  • Multi-component fuel blends: diesel, biodiesel, DME, E10–E85
  • Exportable droplet size distribution histograms (CSV + SVG)
Booking Open
// 03 — EXPERT SERVICES

CFD Training
& Consulting

One-on-one and cohort-based training by an active combustion CFD researcher. From OpenFOAM mesh generation to reacting-flow LES — learn the workflows that power real journal papers, not toy tutorials.

  • CONVERGE CFD: autonomous meshing, spray, ignition, and in-cylinder combustion setup
  • GT-Power: 1D engine system modeling, valve timing, turbocharger matching, fuel path
  • Reacting flow: chemical mechanism reduction, flamelet models, knock prediction
  • Post-processing: Python automation, publication-quality figures, data pipelines
  • HPC job submission: Slurm, PBS, cluster profiling and scaling analysis
  • Live sessions, recorded modules, and async code review on your simulations
agnicycle · cfd_session · live
CONVERGE CFD GT-Power In-cylinder combustion Spray modeling Knock prediction Turbocharger matching Python automation Slurm / PBS Cantera + more coming
About AgniCycle™

The name, the mission,
the physics

Agni — the classical Sanskrit term for fire and ignition. Cycle — continuous thermodynamic closed-loop conversion. Together: a platform designed to model the controlled burn at the heart of every engine.

Our mission is to accelerate the path to clean propulsion — allowing researchers to safely push alternative fuels to their thermodynamic boundaries, modeling knocking, thermal wall losses, and nitrogen oxide freezing under real-world operating maps.

Where GT-Power and AVL BOOST require local servers and minutes of compile time, AgniCycle's algebraic state solver — fully optimized in client-side TypeScript — completes a full transient 2,881-step run in under 20 ms, enabling fluid real-time slider sweeps with instant visual feedback.

⚡ < 20 ms per full run
2,881 discrete equations solved client-side. No server round-trip, no compile step — instant feedback on every parameter change.
🧬 Double-Wiebe Mixed Kinetics
Models both homogeneous spark-ignition flame propagation and heterogeneous diesel diffusion spray — premixed kinetic and gradual droplet-diffusion phases, simultaneously.
🔊 Procedural Sound Engine
dP/dθ mapped live to FM oscillators. Crankshaft knock resonance calculated from speed of sound and bore geometry — no static WAV samples.
The Team

Built by an active researcher,
not a software house

DK
Founder & Developer
Dr. Dhananjay Kumar
Postdoctoral Research Associate Engine Research Center · UW–Madison
"Every research group deserves access to production-quality combustion tools — not just the ones with GT-Suite licenses."

AgniCycle is built and maintained by Dr. Kumar — an active combustion researcher at one of the world's foremost IC engine laboratories. Every tool is grounded in his daily research practice, not abstracted from it.

His work spans hydrogen & alternative fuel combustion, fuel spray characterization, in-cylinder CFD, and zero-D engine cycle modeling — the exact physics encoded in these tools.

H₂ Combustion NH₃ & DME Spray Physics 0-D Thermodynamics CONVERGE CFD Knock Prediction GT-Power OpenFOAM
40+
Peer-reviewed papers
403+
Citations
11
h-index
10+
Years combustion R&D
Platform capabilities

Everything combustion researchers need

Designed for the full research workflow — from back-of-envelope to publication.

🔥
Real Fuel Thermochemistry
JANAF/NASA polynomial fits for H₂, CNG, methanol, ethanol, iso-octane, and custom blend definitions. No hardcoded k values.
📊
Live P-V & T-S Diagrams
Interactive, zoomable thermodynamic diagrams that update in real-time as you sweep parameters. Export as SVG or PNG.
💧
Spray Characterization Suite
SMD, penetration, evaporation, and cone angle — all in one tool. Compare injection pressures side-by-side.
🧪
Parametric Sweep Engine
Define ranges for any input variable and generate full sensitivity surfaces — efficiency vs. CR vs. φ — with one click.
🎓
Expert CFD Mentorship
Learn by doing: live code reviews of your actual OpenFOAM cases, not generic tutorials. From mesh to publishable results.
☁️
Cloud-Native Architecture
Containerized on Google Cloud Run. Auto-scales to demand, zero cold-boot friction, and always on the latest version.
How it stacks up

AgniCycle vs. GT-Power

AgniCycle is the rapid-prototype layer before GT-Suite. Map the entire parameter space in seconds — then commit to 1-D flow modeling with confidence.

Parameter
AgniCycle
GT-Power (GT-Suite)
Model type
0-D Multi-Zone thermodynamic
1-D Navier-Stokes gas flow
Solve time
< 20ms · browser client-side
Minutes on desktop CPU
Access & cost
Free account · any browser · 1-min setup
Per-seat license + license server
Fuel library
12+ models: H₂, NH₃, DME, gasoline, diesel, E85…
Requires calibration maps
Best for
Rapid concept sweeps, teaching, alt-fuel research
Production 1-D engine pipeline

Use AgniCycle to explore the parameter landscape — then lock in your best candidates for high-fidelity GT-Power validation.

Who it's for

Built for every corner of combustion R&D

From doctoral candidates running their first cycle analysis to senior engineers validating injection strategies.

🔬
Graduate Researchers
Skip the environment setup. Run thermodynamic cycle models in your browser, export results for your thesis, and share live states with your advisor.
🏭
Engine Development Engineers
Rapid concept screening before committing to expensive GT-Power models. Evaluate fuel alternatives and compression ratios in minutes.
👩‍🏫
Instructors & Educators
Embed live simulations in lectures. Students interact with real P-V diagrams — no MATLAB license, no IT request, no excuses.
Roadmap

What we're building

AgniCycle is in active development. Here's what's live, what's in progress, and what's coming next.

Phase 1 · Now
Foundation
Live
  • Zero-D IC Engine Cycle Simulator (v1.3)
  • Double-Wiebe combustion model
  • Fuel Spray Calculator (SMD, penetration, cone angle)
  • CFD Training & Consulting (CONVERGE, GT-Power)
  • Researcher & Academic / Instructor user modes
  • Advanced Research Workspace Invite-only
  • Public launch at agnicycle.github.io
Phase 2 · Coming Soon
Expansion
In Development
  • Advanced Research Workspace — open to all registered users
  • Multi-cylinder engine configuration
  • 1D gas exchange — intake & exhaust modeling
  • Knock prediction & knock-limited spark advance
  • Turbocharger & supercharger performance maps
  • Emissions estimation — NOx, soot, CO, HC
  • Shareable simulation states via URL
Phase 3 · Future
Platform
Planned
  • Alternative fuel certification toolkit (H₂, NH₃, e-fuels)
  • Real-time collaboration & shared workspaces
  • API access for programmatic simulation runs
  • Export to GT-Power & CONVERGE input formats
  • Integrated spray–combustion coupling
  • Mobile-optimized interface

Have a feature request? Send it directly →

Built with Python NumPy · SciPy Cantera Plotly FastAPI Google Cloud Run Docker TypeScript
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