Hello, A yearly allocation for the LCRC cluster has been requested with the following updated information: Submitter/PI: Anqi Zhang Project Name: ignition-plasma Division: ES Project title: Numerical Investigation of Plasma Fundamentals for Engine Ignition Applications Associated funding: DOE Vehicle Technologies Program Office Other Systems: Science: This project is dedicated to develop comprehensive simulation tools for the complex ignition process involving thermodynamics, chemistry, fluid mechanics, and plasma science. A wide range of ignition technologies have been applied to gasoline engines, including conventional spark, laser ignition, and non-equilibrium plasma ignition, while detailed understanding of energy discharge and ignition fundamentals is still to be pursued. Recent developments in advanced diagnostics have enabled quantitative measurements of plasma and ignition. Thermal energy release and active species formation have been experimentally investigated using x-ray radiography (APS), calorimetry (Sandia), and O-TALIF (Sandia) techniques. This project serves as an effort to leverage the experimental findings with high-fidelity numerical simulations. Different ignition technologies will be characterized in terms of temporal and spatial energy distribution profiles, and the effects of boundary condi tions, fuel properties, and flow motion will be evaluated. Advanced computational capability helps to achieve detailed and predictive simulations of ignition events for future engine developments with improved fuel economy. Project description: There are two major goals for this project: • Establish proper methodology to characterize different ignition systems and assess their effects on engine combustion • Investigate practical solutions to integrate essential physical processes to larger-scale engine simulations Detailed energy deposition method in Eulerian domain has been used and yielded promising results for conventional systems in FY2016. In FY2017, similar numerical approach will be carried on to: 1) improve conventional spark ignition model to account for local flow effects; 2) characterize non-equilibrium plasma discharge against experimental measurements (x-ray radiography and O-TALIF); 3) identify dominate species and reactions induced by non-equilibrium plasma ignition systems; 4) evaluate the effect of electric field; and 5) validate ignition model performance against optical flame kernel measurements. Simulations of this project will be performed using CONVERGE CFD code which features run-time mesh generation that speeds up pre-processing. Paraview together with python scripts will be used for post processing of CFD results. The computational cell count is on the order of one to a few million cells depending on the physical geometries. Currently, there will be only one member user (zhanga) working regularly on this project performing on average 2 jobs daily. A typical job would require 48-96 cores, yielding an estimation of quarterly core-hrs requirement of 64 cores x 24 hrs x 90 days x 2 jobs = 276,480. In addition, a portion of post processing will also be carried on the cluster to save file transfer time. With moderate queuing time taken into account, 225,000 core-hrs per quarter are requested for FY2017 for this project. The efforts will be distributed relatively evenly throughout the year. Industry partnership: Project URL: Current FY Hours Used: undetermined amount New FY Requested allocation: 900000 Q1: 225000 Q2: 225000 Q3: 225000 Q4: 225000 Justification: Previous scalability tests performed on Blues have shown acceptable efficiency on up to 4 nodes: Job: Detailed energy deposition for spherical flame development in Eulerian domain (first 80 time steps during which high power energy release occurs): Nodes Wall Time Used (sec) Efficiency 1 node (16 cores) 3613 - 2 nodes (32 cores) 2053 88% 3 nodes (48 cores) 1502 80% 4 nodes (64 cores) 1195 76% Storage requirements: The project currently has 3TB of storage and over 2TB has been used to keep 3D output files. I would like to request to increase the allocation to 4TB to handle the increasing results and new simulation jobs. The analysis and evaluation of the ignition simulation results highly relies on detailed post-processing of 3D numerical results. Thank You, The LCRC Accounts System