High-Speed Propulsion
Ramjets, scramjets, rotating detonation engines, oblique detonation engines, inlet and combustor coupling, shock-boundary-layer interactions, and propulsion subsystem interactions.
Carnegie Mellon University • Mechanical Engineering
Laboratory for
Computational Fluids
and Energy Sciences
High-fidelity simulations of fluid dynamics in energy-conversion processes.
The research laboratory lead by director Ryan F. Johnson, Associate Professor, Department of Mechanical Engineering, Carnegie Mellon University.
Our research
Reacting & Multiphase Flows
Detonation structure, shock-reaction coupling, chemically reacting flow, solid-fuel pyrolysis, supercritical injection, fuel mixing, and material interfaces.
Computational Methods
High-order CFD, finite-volume and DG methods, unstructured grids, robust conservative schemes, positivity preservation, entropy stability, and GPU-scalable solvers.
Accelerated Predictive Modeling
Reduced and mixed precision, computational chemistry acceleration, multifidelity models, machine learning, tensor-network compression, and optimization workflows.
Featured research
High-Confidence Solutions to Challenge Problems
Jet in Supersonic Crossflow
Fuel-air mixing, shock/jet interaction, and penetration dynamics for transverse injection into high-speed crossflow.
Read moreDetonation Dynamics
Shock-reaction coupling, reflected-wave stabilization, and the physics of transient detonation structures.
Read moreRotating Detonation Engines
Annular flow, propagation modes, thermodynamic coupling, and engine-level performance prediction.
Read moreSolid-Fuel Ramjets
Pyrolysis, surface regression, flame structures, and coupled boundary-layer and diffusion processes.
Read moreSupercritical Fuel Injection
Real-fluid thermodynamics and transcritical mixing in high-pressure energy-conversion devices.
Read moreRobust Methods for Reacting Flows
High-order methods for conservative, positivity-preserving, entropy-bounded simulation of compressible reacting flow.
Read moreStrut-Based Fuel Injection
Strut-injector mixing, shock structures, and fuel-air distribution in high-speed combustor flowpaths.
Read moreSelected publications
Recent work
People
Leadership and current students
Ryan F. Johnson
Director
Sierra Martinez
PhD Student
George Tang
PhD Student
Melik Demirel
PhD Student
Darren Kim
PhD Student