Time granted. -- John Roberts Argonne National Laboratory CELS Systems [email protected] On 3/8/17, 8:05 AM, "[email protected] on behalf of Bair, Raymond A." <[email protected] on behalf of [email protected]> wrote: Lets add the 20K requested for March. Ray ----------------------------------------- Ray Bair Argonne National Laboratory and the University of Chicago On 3/7/17, 4:19 PM, "Christopher F. Powell, Ph.D." <[email protected]> wrote: Ray, We've got a paper due at the end of March, and 15-20K hours would let us finish that up on time. thanks, chris On 3/7/2017 3:00 PM, Bair, Raymond A. wrote: > Dear Chris, > > April starts the 2nd half of FY17, and you will be getting the second half allocation then. How much more time do you need between now and March 31? > > Regards, > > Ray > > > ----------------------------------------- > Ray Bair > Argonne National Laboratory > and the University of Chicago > > > On 3/3/17, 11:43 AM, "[email protected] on behalf of [email protected]" <[email protected] on behalf of [email protected]> wrote: > > Hello, > > A change in allocation has been requested: > > Requester: cpowell (Chris Powell) > Project: XRayFuelSpray > Title: Fuel Injection and Sprays Studied Using X-Ray Diagnostics > Description: The cavitation and diesel spray modeling sub-tasks are being performed using the OpenFOAM framework. These tasks will consume the bulk of the requested core hours. A number of state-of-the-art numerical solvers have been implemented in OpenFOAM; namely incompressible-liquid and fully compressible homogeneous relaxation cavitation models and more recently a fully compressible homogeneous relaxation cavitation model which includes non-condensable gas modeling (HRMFoam). This code can handle both cavitating as well as flash boiling flows. These codes were developed by Schmidt et al at the University of Massachusetts-Amherst, and we continue to collaborate with them on code development and efficiency improvements. The HRMFoam solver has been tested for scalability and shown good performance on up to 300 processors. We typically run jobs with 64 to 128 processors. > > The diesel spray sub-task in OpenFOAM studies turbulent, aerodynamic, and hybrid spray atomization sub-model formulations for high-pressure fuel sprays via customized sub-models. The target sprays for simulation will be the Engine Combustion Network (ECN) non-vaporizing Spray A and Spray D conditions. LCRC resources will enable GA Tech to rapidly assess model formulations and sensitivities over a wide range of liquid Weber and Reynolds number conditions, probing the relevance of turbulence and aerodynamic atomization mechanisms at limiting conditions. > > The combusting spray sub-task in OpenFOAM investigates the coupling of spray sub-models and turbulence-chemistry interactions for spray combustion through the development and implementation of a Large-Eddy Simulation (LES) framework. The target sprays for simulation will be the Engine Combustion Network (ECN) reacting Spray A condition. LCRC resources facilitate the simulation of multiple LES realizations in order to obtain reliable statistics for predicted spray and combustion parameters, which is essential for comparison against experimental measurements from APS and GA Tech. These comparisons will enable an in-depth study of both the instantaneous and average coupling between spray-induced turbulence structures and the resultant chemistry and flame evolution. > > The tasks described above will be run on 64 to 128 processors and will consume the bulk of the allocation requirement. Due to the conclusion of several sub-tasks from the previous FY, our allocation requirement for FY17 is reduced. > Tomographic reconstruction of APS data will be conducted using the TomoPy software package developed at Argonne. We run single-node jobs to efficiently perform multiple reconstructions of large (hundred-GB) datasets; these typically require less than 100 core hours each, but have high RAM requirements. This task will benefit substantially from the availability of the more powerful Haswell nodes and we are investigating the possibility of purchasing dedicated nodes on the new Bebop machine for this purpose. > > We have also successfully compiled a Paraview server on Blues which allows us to rapidly visualize the results of our simulations and reconstructions without having to wait to download the data to our local computer. This allows us to achieve rapid turnaround of results during beamtime. This is a significant aid to the experimental program. The server runs typically on a single Blues ‘biggpu’ node (16 cores) which allows us to open simulation datasets that are much larger than the RAM available on our desktop computers. This task requires relatively few core hours, since the server is only used for a few hours at a time. > Current: undetermined amount > Justification: Due to the conclusion of several sub-tasks, and plans to purchase dedicated nodes, our allocation requirements for FY17 are much less than in the previous year, and will not exceed 0.5M core hours. > > Requested: 20000 > > A specific reason has been given: > In our collaboration with Georgia Tech, we are working on fuel injection simulations for an upcoming publication. Additional CFD runs were required for grid convergence, and more CPU hours are required to complete this work. > > This needs to be approved and the final allocation amount decided upon. > > Thank You, > The LCRC Accounts System > > -- Christopher F. Powell, Ph.D. Center for Transportation Research Argonne National Laboratory 9700 South Cass Avenue Bldg 362, Room C217 Argonne, IL 60439 email: [email protected] phone: (630) 252-9027 fax: (630) 252-3443 _______________________________________________ allocations-admins mailing list [email protected] https://lists.lcrc.anl.gov/mailman/listinfo/allocations-admins