When does a hydrogen leak stop behaving like a jet?
- The question
- An accidental hydrogen release starts as an under-expanded momentum-driven jet and ends as a buoyant plume steered by ventilation or wind. Where that transition happens decides where the flammable envelope sits — and therefore where a sensor has to be to catch it in time. Current guidance treats the regimes separately.
- Year one
- Build and validate a CFD case for a compressible hydrogen release against published jet data; map the transition across release pressure, orifice size and crosswind; identify the dimensionless grouping that predicts it.
- You would learn
- Compressible and buoyant flow modelling, species transport, mesh and AMR strategy for near-field jets, and systematic verification and validation.
- Good fit if
- You are comfortable with fluid mechanics and want to do computation properly — not just run a solver.