• To advance the state-of-the-art CFD algorithms and high performance computing (HPC) on energy-efficient parallel computer architectures
  • To design, analyze, and optimize next generation low-emission and high-efficiency combustion systems and turbomachinery with geometric complexity
  • To achieve high-fidelity full engine simulations on leadership computing facilities


Chord, our in-house CFD code, is a highly-parallel, fourth-order accurate, solution-adaptive, finite-volume CFD algorithm on a structured grid. The AMR is constructed using the Chombo parallel AMR library. Chord solves the system of governing equations for transient, compressible, viscous gaseous flows, both non-reacting and reacting.

Numerical Capabilities:

  • Accuracy: Fourth-order, Godunov-type finite-volume method
  • Efficiency: Parallel, adaptive mesh refinement (AMR)
  • High-fidelity representation of engineering geometries with complexity: Embedded boundary (EB) technique and mapped grids
  • Scalability: 100,000 cores for AMR, 10,000 cores for EB

Application Capabilities:

  • Fundamental studies of multi-scale, multi-physics compressible flows (for example, fully-resolved flame characteristics of gaseous fuels)
  • CFD-based design, analysis, and optimization of turbomachinery and combustion devices (for example, compressor, gas-turbine combustor)


We perform our calculations on ISTeC Cray High Performance Computing (HPC) System for large jobs and on Atlantis Cluster for medium jobs.

The ISTeC Cray is a Model XE6 with 2,688 compute cores, 2.5 TB of main memory, a Gemini 3D-torus interconnect and 32 TB of disk storage.

The Atlantis Cluster is HPC infrastructure in the CFD & Propulsion Laboratory at Colorado State University. It consists of:

  • Master node
    • 2x 6-core, 2.1 GHz CPU, 15 MB L3 Cache CPU
    • 64 GB DDR3 (100 GB/s bandwidth)
    • RAID controllers
  • Storage
    • 26 TB (usable) in RAID 6 + 2 hot spares
  • Compute nodes
    • 2x 10-core, 2.5 GHz, 25 MB L3 cache Intel E5-2670 v2 CPU
    • 128 GB DDR3 (100 GB/s bandwidth)
    • 1x Nvidia Kepler K20 GPU
  • 40 GB/s bandwidth interconnect
  • New 5x Boeing compute nodes
    • 2x 12-core, 2.3 GHz, 30 MB L3 cache Intel E5-2670 v3 CPU
    • 64 GB DDR4 (136 GB/s bandwidth)