A medium-scale (30 cm diameter) methanol pool fire was simulated using Sandia National Laboratories’ Sierra/Fuego low-Mach number multi-physics turbulent reacting flow code. Large Eddy Simulation (LES) with subgrid kinetic energy closure used as the turbulence model. Combustion modeled a strained laminar flamelet library approach. Radiative heat transfer gray-gas approximation. This paper detai...

The paper deals with the self-ignition and combustion of hydrogen jets in a high-speed transverse flow hot vitiated air duct. Improved Delayed Detached Eddy Simulation (IDDES) approach based on Shear Stress Transport (SST) model is used, which this applied to turbulent reacting finite rate chemical reactions. An original Adaptive Implicit Scheme for unsteady simulations flows combustion, was su...

Ignition and relighting in supersonic flows is an important challenge for the design of hypersonic propulsion systems. Supersonic compressible interest exhibit much larger local variations velocity, shear, thermodynamic state than their incompressible counterparts. Thus, it to study relationship between ignition kernel evolution, initial spark location, kernel’s subsequent flow history. We leve...

A generic nonlinear Maxwell model for the stress tensor in viscoelastic materials is studied under mixing scenarios in a three-dimensional steady lid-driven cavity flow. Resulting laminar and turbulent flow profiles are investigated to study their mixing efficiencies. Massless tracer particles and passive concentrations are included to show that the irregular spatio-temporal chaos, present in t...

among the all parameters affecting the performance of a downhole de-oiling hydrocyclone, the investigation of internal flow field deserves more attempts especially in the petroleum industry. in this study, the effects of inlet flow rate, inlet oil volume fraction, and oil droplet diameter on the separation efficiency and pressure drop ratio have been investigated along the hydrocyclone body. al...