Hello, A change in allocation has been requested: Requester: ssom (Sibendu Som) Project: biodiesel-combustion Title: Computation Fluid Dynamics Modeling of Petrodiesel and Biodiesel Description: The project is dived in two parts: In the first part, engine processes will be modeled using petrodiesel. The spray data obtained from Advanced Photo Source at Argonne and single-cylinder engine performance and emission data from CAT cell will be used to further develop and validate spray and combustion models in CONVERGE and perform parametric studies. The major motivation is to develop more predictive and robust sub-models for capturing diesel engine processes. In the second part, fundamental studies will be performed to establish flame stabilization and lift-off characteristics of biodiesel using CONVERGE. A new surrogate (consisting of methyl decanoate, methyl 9 decenoate, n-heptane) fuel will be used for modeling the combustion characteristics of biodiesel. Comparison will be performed between inner nozzle flow, non-evaporating and evaporating spray, combustion characteristics, engine performance and emission characteristics of biodiesel and petrodiesel. Biodiesel fuel obtained from different feedstocks such as Soy, Cuphea, Rape-seed will be modeled. Blends of biodiesel with diesel fuel will also be simulated. FORD motor company has requested this surrogate mechanism for performing some internal studies. Based on the feedback from FORD, the mechanism will be further improved for the benefit of the industry. 1) Finite volume schemes 2) RANS turbulence models used 3) Detailed chemical kinetic models for diesel and biodiesel fuels 4) CONVERGE software is being used - ~50 licenses available 5) Scales well up-to 256 processors 6) Detailed spray models used for different spray processes 7) Full cycle engine simulations Current: undetermined amount Justification: Requested: 150000 A specific reason has been given: in the past couple of weeks, my team has been running massive optimization simulations on Fusion and Blues clusters. We have exceeded our requested core hour limits on all the projects. If there is still time available on Fusion, I would request 100K core hours on this project. We have a paper deadline on March 28th which has instigated these massive simulations. This needs to be approved and the final allocation amount decided upon. Thank You, The LCRC Accounts System