PNNL

Rajesh Singh is a mechanical engineer in the Operational System Engineering group at Pacific Northwest National Laboratory (PNNL). His principal areas of expertise are in computational fluid dynamics, multiphase flows, computational fluid-particle flow, turbulent flows, hydropower, and carbon capture. Singh has more than 18 years of extensive research experience in computational fluid dynamics investigations of complex engineering and scientific problems in the various fields such as mechanical, chemical, biomedical, material processing, hydraulics, and aerospace. He performs both fundamental and applied research in fluid dynamics across various engineering and scientific fields. Prior to joining PNNL, he was a team member of the R&D 100 award winning project carbon capture simulation initiative at the National Energy Technology Laboratory.

• Computational fluid dynamics
• Multiphase flows
• Turbulent flows
• Hydraulics
• Hydropower
• Carbon capture
• Magnetohydrodynamics
• Bio-fluid mechanics

• PhD in biomechanics, University of Delaware, Newark
• MTech in engineering mechanics, Indian Institute of Technology Delhi, India
• BE in mechanical engineering, Rajiv Gandhi Proudyogiki Vishwavidyalaya, India

• American Physical Society

• R&D 100 Award 2016, as a member of the CCSI Toolset team, R&D World, 2016
• Certificate of Outstanding Contribution in Reviewing, Flow Measurement and Instrumentation, 2016
• University Graduate Fellow, University of Delaware, 2012
• Elisa Conover Award (Outstanding PhD student in Fluid Mechanics), University of Delaware, 2009

2022

• Asgharian B., O. Price, A. Borojeni, A.P. Kuprat, S.M. Colby, R.K. Singh, and W. Gu, et al. 2022. "Influence of alveolar mixing and multiple breaths of aerosol intake on particle deposition in the human lungs." Journal of Aerosol Science 166. PNNL-SA-170666. doi:10.1016/j.jaerosci.2022.106050
• Giberson C.M., R.K. Singh, J. Chun, A.P. Huntley, J. Zhong, Y.M. Ibrahim, and G.K. Schenter, et al. 2022. "SimELIT: A Novel GUI-based Comprehensive Ion Trajectory Simulation Software for Mass Spectrometry." Journal of the American Society for Mass Spectrometry 33, no. 8:1453–1457. PNNL-SA-167242. doi:10.1021/jasms.1c00301
• Mater B.D., C.C. Coutant, W.A. Perkins, J.F. Christ, D.M. Anderson, K.D. Ham, and R.K. Singh, et al. 2022. “Making a Deal with the Devilfish: Biometric-Informed Screening Technology (CRADA 514).” PNNL-32845. Richland, WA: Pacific Northwest National Laboratory.
• Feng S., R.K. Singh, Z. Li, Y. Wang, Y. Fu, J. Bao, and Z. Xu, et al. 2022. "Low-Tortuous and Dense Single-Particle-Layer Electrode for High-Energy Lithium-Sulfur Batteries." Energy & Environmental Science 15, no. 9:3842-3853. PNNL-SA-161239. doi:10.1039/D2EE01442D
• Fu Y., J. Bao, R.K. Singh, R.F. Zheng, C. Anderson-Cook, S. Bhat, and Z. Xu. 2022. "The Influence of Random Packed Column Parameters on the Liquid holdup and Interfacial Area." AIChE Journal 68, no. 8:e17691. PNNL-SA-160943. doi:10.1002/aic.17691
• Romero-Gomez P., R.K. Singh, M.C. Richmond, and S. Weissenberger. 2022. "Numerical Investigation of Inertial Sphere Impaction on a Cylinder in Subcritical Flow." Particulate Science and Technology 40, no. 01:35-49. PNNL-SA-150164. doi:10.1080/02726351.2021.1904308
• Singh R.K., P. Romero-Gomez, A. Colotelo, W.A. Perkins, and M.C. Richmond. 2022. "Computational studies of hydraulic stressors for biological performance assessment in a hydropower plant with Kaplan turbine." Renewable Energy 199. PNNL-SA-171700. doi:10.1016/j.renene.2022.09.016
• Singh R.K., Y. Fu, C. Zeng, D.T. Nguyen, P. Roy, J. Bao, and Z. Xu, et al. 2022. "Hydrodynamics of countercurrent flow in an additive manufactured column with triply periodic minimal surfaces for carbon dioxide capture." Chemical Engineering Journal 450, no. 2:138124. PNNL-SA-171812. doi:10.1016/j.cej.2022.138124
• Zeng C., Y. Fu, R.K. Singh, J. Bao, and Z. Xu. 2022. "Differentiation of static and dynamic interfacial area in the structured packed column." Chemical Engineering Science 260. PNNL-SA-165106. doi:10.1016/j.ces.2022.117877

2021

• Abrecht D., J.L. Bair, J.F. Corbey, N.S. Deshmukh, W.E. Frazier, A.A. Howard, and S. Hu, et al. 2021. Modeling of induction stirring and particle tracking in molten uranium. PNNL-32020. Richland, WA: Pacific Northwest National Laboratory. Modeling of induction stirring and particle tracking in molten uranium
• Kuprat A.P., M. Jalali, T. Jan, R.A. Corley, B. Asgharian, O. Price, and R.K. Singh, et al. 2021. "Efficient bi-directional coupling of 3D Computational Fluid-Particle Dynamics and 1D Multiple Path Particle Dosimetry lung models for multiscale modeling of aerosol dosimetry." Journal of Aerosol Science 151. PNNL-SA-153587. doi:10.1016/j.jaerosci.2020.105647
• Singh R.K., B.D. Pflugrath, and K.R. DeSomber. 2021. Tutorial Guide: Biological Performance Assessment (BioPA) Toolset for High Head Passage. PNNL-32109. Richland, WA: Pacific Northwest National Laboratory. Tutorial Guide: Biological Performance Assessment (BioPA) Toolset for High Head Passage
• Singh R.K., M.C. Richmond, P. Romero-Gomez, C.L. Rakowski, and J.A. Serkowski. 2021. Validation of Computational Fluid Dynamics Simulations for Biological Performance Assessment in Hydropower units. PNNL-30068. Richland, WA: Pacific Northwest National Laboratory. Validation of Computational Fluid Dynamics Simulations for Biological Performance Assessment in Hydropower units

2020

• Fu Y., J. Bao, C. Wang, R.K. Singh, and Z. Xu. 2020. CFD Study of Countercurrent Flow in Triply Periodic Minimal Surfaces with CO₂BOL Solvent. PNNL-29590. Richland, WA: Pacific Northwest National Laboratory. CFD Study of Countercurrent Flow in Triply Periodic Minimal Surfaces with CO₂BOL Solvent
• Fu Y., J. Bao, C. Wang, R.K. Singh, D. Barpaga, R.F. Zheng, and Z. Xu, et al. 2020. Absorber Column CFD model validation against PNNL's device-scale absorber column on the LCFS unit. PNNL-29828. Richland, WA: Pacific Northwest National Laboratory. Absorber Column CFD model validation against PNNL's device-scale absorber column on the LCFS unit
• Fu Y., J. Bao, R.K. Singh, C. Wang, and Z. Xu. 2020. "Investigation of Countercurrent Flow Profile and Liquid Holdup in Random Packed Column with Local CFD Data." Chemical Engineering Science 221. PNNL-SA-148356. doi:10.1016/j.ces.2020.115693
• Singh R.K., J. Bao, C. Wang, Y. Fu, and Z. Xu. 2020. "Hydrodynamics of countercurrent flows in a structured packed column: effects of initial wetting and dynamic contact angle." Chemical Engineering Journal 398. PNNL-SA-149254. doi:10.1016/j.cej.2020.125548

2019

• Wang C., R.K. Singh, and Z. Xu. 2019. "Device-scale Computational Fluid Dynamics Modeling of Carbon Dioxide Absorption Using Encapsulated Sorbents." Powder Technology 344. PNNL-SA-136437. doi:10.1016/j.powtec.2018.12.038
• Xu Z., R.K. Singh, J. Bao, and C. Wang. 2019. "Direct Effect of Solvent Viscosity on the Physical Mass Transfer for Wavy Film Flow in a Packed Column." Industrial and Engineering Chemistry Research 58, no. 37:17524-17539. PNNL-SA-139101. doi:10.1021/acs.iecr.9b01226

2018

• Singh R.K., C. Wang, and Z. Xu. 2018. "Residence time distribution in a structured packing unit for monitoring aerosol emissions." International Journal of Greenhouse Gas Control 79. PNNL-SA-135050. doi:10.1016/j.ijggc.2018.11.001
• Singh R.K., J. Bao, C. Wang, and Z. Xu. 2018. Device-scale CFD study for mass transfer coefficient and effective mass transfer area in packed column. PNNL-28161. Richland, WA: Pacific Northwest National Laboratory. Device-scale CFD study for mass transfer coefficient and effective mass transfer area in packed column
• Singh R.K., J. Galvin, and X. Sun. 2018. "Multiphase flow studies for microscale hydrodynamics in the structured packed column." Chemical Engineering Journal 353. PNNL-SA-132858. doi:10.1016/j.cej.2018.07.067