Respiratory CFD ยท Inhaled delivery

See where every breath lands.

SomnetX simulates airflow and aerosol transport through the human airway, from the mouth to the deep bronchi, and tells you how much of each dose deposits in every region. Answers in days, before you commit to imaging or clinical studies.

60 L/min inhalation 0.5 mm lattice 22 airway regions GPU lattice Boltzmann LES
Glowing 3D model of a human airway from mouth and throat through the trachea into the bronchial tree mouthpiece trachea carina bronchial tree
SimInhale benchmark airway ยท particle paths illustrative
The gap

Your impactor measures particle size. Your patient needs to know where it lands.

Pharmacopeial tests push the aerosol through a right-angle metal throat at a constant flow. For many products they underpredict what the mouth and throat catch, and so overestimate the lung dose. We run the same aerosol through a human airway with a realistic breath.

What your cascade impactor reports ThroatS1S2S3S4S5S6S7MOC

Drug mass by particle size band. No anatomy, one fixed flow.

What SomnetX reports
Airway model coloured by aerosol deposition, hot in the mouth and throat and at the main bifurcation
Mouthโ€“throat
Trachea
Central bronchi
Smaller branches
Deep lung

Dose by airway region, for each flow profile and particle size you test.

Both panels are illustrative layouts, not measured values.

Where it pays off

Three problems inhalation teams are facing now.

Propellant switch 2030

The EU exemption for pMDI propellants shrinks from 2027 and ends in 2030. 44% of pMDIs sold have no declared low-GWP plan.

Compare regional deposition of your current and new-propellant formulations from your own APSD data, before you commit to bridging studies.

Source: Inhalation, Dec 2025
Generic inhalers $45M

Industry estimate for a single clinical-endpoint bioequivalence study with more than 900 patients.

Regional deposition evidence to support an in vitro and modelling route, in line with FDA's work on model master files.

Source: ONdrugDelivery (Nanopharm), 2020
Real patients 82%

of hospitalised COPD patients misused at least one inhaler, including breaths too weak for the device.

Test weak, typical and strong breaths in different airway geometries without recruiting a single patient.

Source: Grandmaison et al., Chronic Obstr Pulm Dis, 2024
Where we fit

Answer early questions on the cheapest step.

Simulation does not replace your clinical programme. It tells you which formulation, device or breathing condition deserves the expensive steps, and gives reviewers a mechanism behind your data.

  1. In silico CFDdays ยท no subjects
  2. In vitro, realistic throatlab rig ยท weeks
  3. Gamma scintigraphytens of volunteers ยท radiolabel
  4. Pharmacokinetic studyvolunteers ยท clinic
  5. Clinical endpoint study900+ patients ยท โ‰ˆ$45M

Step heights indicate relative cost and effort, not exact figures.

Validation

Checked against experiment, line by line.

Before we model your device, the solver is tested on the ERCOFTAC realistic-airway benchmark, where PIV measurements and published LES are available.

Case
ERCOFTAC AC7 mouth-to-bronchi airway
Flow
60 L/min steady inhalation
Solver
GPU lattice Boltzmann, 0.5 mm lattice
Statistics
2 flow-through times, time-averaged
Compared
PIV and reference LES at six stations
PIV experiment SomnetX LBM 0.5 mm Reference LES

Mean in-plane velocity across each PIV line, normalised by the tracheal bulk velocity. Real simulation output, shown for all six stations without smoothing.

Technology

From scan to answer, hands-off.

You send the airway and the question. One automated pipeline does the rest.

Your CT and conditions Scan or STL, flow rate, particle size
SomnetX pipeline Segment ยท voxelise ยท simulate on GPU
Regional dose report Where the dose lands, region by region
No mesh

The airway is filled with cubes automatically. No days of manual mesh repair.

1 GPU

A full mouth-to-bronchi airway at 0.5 mm in about 7.4 hours, measured on our own run.

ร—12

Three flow rates by four particle sizes, submitted as one batch instead of twelve projects.

Automatic CT segmentation is in development. Today we start from your STL or a segmented scan.

Platform

One pipeline from inhaled breath to regional dose.

We resolve the turbulent laryngeal jet, track particles through it, and report deposition by anatomical region. The same model runs on your device's flow profile and your formulation's size distribution.

01 ยท Airflow

Turbulence-resolving airflow

Lattice Boltzmann large-eddy simulation on GPUs. Sub-millimetre resolution across the whole airway, without weeks of meshing.

  • Steady and breathing-cycle inflow
  • WALE / Smagorinsky subgrid models
  • Velocity, pressure and turbulence fields
02 ยท Particles

Lagrangian aerosol tracking

Millions of particles followed through the resolved flow, with drag, slip correction and gravity. Every wall impact is mapped to a region.

  • DPI, pMDI, SMI and nebulizer sizes
  • MMAD and GSD size distributions
  • Deposited, escaped and in-flight ledger
How a pilot runs

From your inputs to a regional dose report.

Scope

We agree the device flow profile, particle size distribution and the questions the report must answer.

โ†’ one-page case definition

Geometry

A validated reference airway, or your CT-derived airway after surface checks and region labelling.

โ†’ labelled airway model

Simulate

Airflow to statistical steady state, then particle injection across your size bins on GPU.

โ†’ flow and particle data

Report

Regional deposition tables, flow visualisations and a methods note you can share internally.

โ†’ PDF report and data files
Inhalation CFD Regional Deposition Pilot
US$1,500โ€“3,500fixed fee

A first, bounded study to test whether simulation answers your question. Price depends on the number of flow rates, particle sizes and whether we use your airway geometry.

  • Up to 2 inhalation flow rates
  • Up to 3 particle sizes or one distribution
  • Reference or customer airway
  • Regional deposition by segment
  • Flow and particle visualisations
  • Review call with the engineers
Built for

Teams who need regional numbers, not a total.

  • Inhaler device developersDPI ยท pMDI ยท SMI
  • Formulation and particle engineeringMMAD ยท GSD
  • Nebulizer and mask designersflow ยท leakage
  • CROs and academic groupsmethod support
Contact

Tell us what you are inhaling.

Send the device type, target flow rate and particle size. We reply within two working days with a scope and a fixed quote.

hello@somnetx.com