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Postdoctoral Appointee on DNS of Particulate Deposition for Aero-Engine Combustor Applications

Livermore, CA 94550
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This postdoctoral position is a temporary position for up to one year, which may be renewed at Sandia's discretion up to five additional years. The PhD must have been conferred within five years prior to employment.

Individuals in postdoctoral positions may bid on regular Sandia positions as internal candidates, and in some cases may be converted to regular career positions during their term if warranted by ongoing operational needs, continuing availability of funds, and satisfactory job performance.

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We are seeking a postdoctoral researcher who will leverage a DOE Exascale Computing Project combustion code, PeleLM, to perform direct numerical simulation of the flow configuration in aero-engine combustor liners accounting for a particulate deposition map (i.e. a deposition probability and characteristics as a function of the flow, particle and surface conditions). Large-eddy simulation with the particle deposition map will simulate the aerodynamics and the particle deposition will be treated using the immersed boundary method, wherein the location of particle depositions is converted to solid deposit in real time with the no slip boundary conditions imposed at the gas-deposit interface. The deposition topology from the LES at different stage of deposition will be used to initialize DNS with PeleLM which will simulate the flow field without any turbulence models and the kinematics of particles at discrete stages of deposition. Comparisons between LES and DNS will quantify the accuracy of subgrid wall-models for LES accounting for deposition characteristics. Moreover, the impact of the coupling between particles kinematics and trajectory and small-scale turbulence structure which is currently unaccounted for in models will be assessed. The postdoc will be expected to present results at national and international conferences and to publish in high-profile peer-reviewed journals.

Required:

+ PhD in engineering, computational sciences, physical sciences, or mathematics
+ Expertise in high-fidelity simulation of turbulent flows and high-performance scientific computing

Desired:

+ Strong background in modeling of turbulent wall-bounded flows
+ Familiarity with particle-laden wall-bounded turbulent flows
+ Familiarity with immersed boundary method, embedded boundary cut cell method, and RANS/LES wall-models
+ Strong interpersonal skills

Department Description:

The Reacting Flow Research team performs experimental and computational modeling studies of reacting flow phenomena relevant to combustion processes.

About Sandia:

Sandia National Laboratories is the nations premier science and engineering lab for national security and technology innovation, with teams of specialists focused on cutting-edge work in a broad array of areas. Some of the main reasons we love our jobs:

+ Challenging work withamazingimpact that contributes to security, peace, and freedom worldwide
+ Extraordinary co-workers
+ Some of the best tools, equipment, and research facilities in the world
+ Career advancement and enrichment opportunities
+ Flexible schedules, generous vacations,strongmedical and other benefits, competitive 401k, learning opportunities, relocation assistance and amenities aimed at creating a solid work/life balance*

_World-changing technologies. Life-changing careers._ Learn more about Sandia at: http://www.sandia.gov

*These benefits vary by job classification.

Security Clearance:

This position does not currently require a Department of Energy (DOE) security clearance.

Sandia will conduct a pre-employment drug test and background review that includes checks of personal references, credit, law enforcement records, and employment/education verifications. Furthermore, employees in New Mexico need to pass a U.S. Air Force background screen for access to Kirtland Air Force Base. Substance abuse or illegal drug use, falsification of information, criminal activity, serious misconduct or other indicators of untrustworthiness can cause access to be denied or terminated, resulting in the inability to perform the duties assigned and subsequent termination of employment.

If hired without a clearance and it subsequently becomes necessary to obtain and maintain one for the position, or you bid on positions that require a clearance, a pre-processing background review may be conducted prior to a required federal background investigation. Applicants for a DOE security clearance need to be U.S. citizens. If you hold more than one citizenship (i.e., of the U.S. and another country), your ability to obtain a security clearance may be impacted.

Members of the workforce (MOWs) hired at Sandia who require uncleared access for greater than 179 days during their employment, are required to go through the Uncleared Personal Identity Verification (UPIV) process. Access includes physical and/or cyber (logical) access, as well as remote access to any NNSA information technology (IT) systems. UPIV requirements are not applicable to individuals who require a DOE personnel security clearance for the performance of their SNL employment or to foreign nationals. The UPIV process will include the completion of a USAccess Enrollment, SF-85 (Questionnaire for Non-Sensitive Positions) and OF-306 (Declaration of for Federal Employment). An unfavorable UPIV determination will result in immediate retrieval of the SNL issued badge, removal of cyber (logical) access and/or removal from SNL subcontract. All MOWs may appeal the unfavorable UPIV determination to DOE/NNSA immediately. If the appeal is unsuccessful, the MOW may try to go through the UPIV process one year after the decision date.

EEO Statement:

All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or veteran status.

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Posted: 2019-11-26 Expires: 2019-12-27

 World-changing technologies. Life-changing careers.

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For more than 60 years, Sandia has delivered essential science and technology to resolve the nation's most challenging security issues.

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Postdoctoral Appointee on DNS of Particulate Deposition for Aero-Engine Combustor Applications

Sandia National Laboratories
Livermore, CA 94550

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