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Cynthia Rakowski

Cynthia Rakowski

Pacific Northwest National Laboratory
PO Box 999
Richland, WA 99352


Cindy Rakowski is a Research Engineer in the Hydrology Group. She is a member of a team of engineers and scientists that focuses on the development and application of computational fluid dynamics to solve problems in environmental and engineered systems.

Ms. Rakowski provides technical expertise in the areas of structured and unstructured mesh generation, flow simulations in 1-, 2-, and 3D. This broad knowledge has led to the development of innovative methodologies for applying computational fluid dynamics (CFD) to rivers and their engineered structures. She is experienced using Gridgen (Pointwise, Inc.) several CFD solver codes including Star-CD (ADAPCO), and MASS1 and MASS2 (PNNL codes); GIS software (Arc/Info (ESRI), and visualization tools such as Tecplot (Amtec).

Research Interests

  • Integration of diverse data sources into a GIS framework to facilitate analysis, and map production that shows results in an easy-to-understand manner.
  • Application of numerical flow models to problems of biological significance, with management applications.

Education and Credentials

  • M.S., Watershed Science, Utah State University, 1997
  • B.S., Physics, Montana State University, 1986

Affiliations and Professional Service

PNNL Publications


  • Oostrom M, Y Mehmani, PDJ Romero Gomez, Y Tang, H Liu, H Yoon, Q Kang, V Joekar Niasar, M Balhoff, T Dewers, GD Tartakovsky, EAE Leist, NJ Hess, WA Perkins, CL Rakowski, MC Richmond, JA Serkowski, CJ Werth, AJ Valocchi, TW Wietsma, and C Zhang. 2016. "Pore-scale and Continuum Simulations of Solute Transport Micromodel Benchmark Experiments." Computational Geosciences 20(4):857-879.  doi:10.1007/s10596-014-9424-0
  • Richmond MC, PDJ Romero Gomez, JA Serkowski, CL Rakowski, and MJ Graf. 2016. Comparative Study of Barotrauma Risk during Fish Passage through Kaplan TurbinesPNNL-SA-113640, Pacific Northwest National Laboratory, Richland, WA. 



  • Richmond MC, JA Serkowski, CL Rakowski, B Strickler, M Weisbeck, and CL Dotson. 2014. "Computational Tools to Assess Turbine Biological Performance." Hydro Review 33(6):,


  • Richmond MC, CL Rakowski, JA Serkowski, B Strickler, M Weisbeck, and CL Dotson. 2013. "Design Tools to Assess Hydro-Turbine Biological Performance: Priest Rapids Dam Turbine Replacement Project." In HydroVision 2013: Proceedings of the HydroVision International Conference, July 23-26, 2013, Denver, Colorado.  HCI Publications, Forest Hills, NY. 
  • Richmond MC, PDJ Romero Gomez, and CL Rakowski. 2013. Simulating Collisions for Hydrokinetic TurbinesPNNL-22580, Pacific Northwest National Laboratory, Richland, WA. 
  • Vernon CR, EV Arntzen, MC Richmond, RA McManamay, TP Hanrahan, and CL Rakowski. 2013. GIS Framework for Large River Geomorphic Classification to Aid in the Evaluation of Flow-Ecology RelationshipsPNNL-22296, Pacific Northwest National Laboratory, Richland, WA. 




  • Johnson GE, MC Richmond, JB Hedgepeth, GR Ploskey, MG Anderson, Z Deng, F Khan, RP Mueller, CL Rakowski, NK Sather, JA Serkowski, and JR Steinbeck. 2009. Smolt Responses to Hydrodynamic Conditions in Forebay Flow Nets of Surface Flow Outlets, 2007PNNL-17387, Pacific Northwest National Laboratory, Richland, WA. 
  • Richmond MC, CL Rakowski, WA Perkins, JA Serkowski, LL Ebner, and SJ Schlenker. 2009. "Modeling Juvenile Salmon Egress Conditions in The Dalles Dam Tailrace using Computational Fluid Dynamics." In Waterpower XVI: New Roles for Hydro in a Changing World, July 27-30, 2009, Spokane, Washington, p. Paper No. 173.  US Army Corps of Engineers, Washington DC. 



  • Rakowski CL, LL Ebner, and MC Richmond. 2007. "Fast-Track Design Efforts Using CFD: Bonneville Second Powerhouse." In Proceedings of the 2004 World Water and Environmental Resources Congress June 27-July 1, 2004, Salt Lake City, UT, ed. G. Sehlke, D. F. Hayes and D. K. Stevens, p. 9 pages.  American Society of Civil Engineers, Reston, VA.  doi:10.1061/40737(2004)233
  • Dauble DD, Z Deng, MC Richmond, RA Moursund, TJ Carlson, CL Rakowski, and JP Duncan. 2007. Biological Assessment of the Advanced Turbine Design at Wanapum Dam, 2005PNNL-16682, Pacific Northwest National Laboratory, Richland, WA. 
  • Dresser TJ, CL Dotson, RK Fisher, MJ Graf, MC Richmond, CL Rakowski, TJ Carlson, D Mathur, and PG Heisey. 2007. "Wanapum Dam Advanced Hydro Turbine Upgrade Project: Part 2 - Evaluation of Fish Passage Test Results Using Computational Fluid Dynamics." In HydroVision 2006, July 31-August 4, 2006 Portland, Oregon, USA, p. 14 pages.  HCI Publications, Kansas City, MO. 
  • Johnson GE, F Khan, JR Skalski, CL Rakowski, MC Richmond, and JA Serkowski. 2007. Hydroacoustic Evaluation of Juvenile Salmonid Passage at The Dalles Dam Spillway, 2006PNNL-16458, Pacific Northwest National Laboratory, Richland, WA. 






  • Rakowski CL, MC Richmond, JA Serkowski, and LL Ebner. 2002. "Three-Dimensional Simulation of Forebay and Turbine Intakes Flows for the Bonneville Project." In HydroVision 2002: Issues Solutions New approaches, p. paper No. 137.  HCI Publications, Kansas City, MO. 
  • Serkowski JA, CL Rakowski, and LL Ebner. 2002. "Visualization of Flow Patterns in the Bonneville 2nd Powerhouse Forebay." In HydroVision 2002, p. no. 121.  HCI Publications, Kansas City, MO. 


Additional Information