Yi-Ju Chou, Ph.D.

Environmental Fluid Mechanics Laboratory
Department of Civil and Environmental Engineering
Stanford University
E-Mail: yjchou@stanford.edu


I am a postdoc research associate working with Professor Oliver Fringer in the Environmental Fluid Mechanics Laboratory at Stanford University.
My research is to study hydrodynamics in environmental and geophysical flows using numerical simulation with an emphasis on sediment
transport and resulting bedform dynamics. In my PhD project, a large-eddy simulation (LES) code along with a sediment transport model and the
dynamic mesh is developed to simulate hydrodynamics and bedform dynamics in coastal oceans and rivers. This numerical tool enables the study
of detailed properties of sand ripple dynamic under various wave-current forcing and associated physical processes in the coastal environment.
I am currently working on a field-scale numerical study of sediment dynamics in San Francisco Bay using a field-scale Navier-Stokes solver, SUNTANS.
The goal is to obtain a better understanding of sediment dynamics under the influence of salinity, wind waves, geometry and tides in an complex estuarine system.

Click to see my research page.

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EDUCATION
Ph.D., Environmental Fluid Mechanics, minor in Computational and Mathematical Engineering, Stanford University, USA, 2009

RESEARCH INTERESTS

  • CFD for environmental flows
  • Sediment transport
  • Turbulent flow physics and modeling
  • Fluvial and coastal geomorphogy modeling
  • Multiphase flow modeling
  • Atmospheric and ocean modeling
  • Dynamic mesh method
  • Immersed boundary method

    • JOURNAL PUBLICATIONS

    Y. J. Chou and O. B. Fringer, 2010, "A model for the simulation of coupled flow-bedform evolution in turbulent flows", Journal of Geophysical Research (submitted).

    Y. J. Chou and O. B. Fringer, 2009, "Consistent discretization for simulation of flows with moving generalized curvilinear coordinates", Int. J. Numer. Methods Fluids, DOI: 10.1002/fld.2046. PDF

    Y. J. Chou and O. B. Fringer, 2008, "Modeling dilute sediment suspension using LES with a dynamic mixed model", Pysics of Fluids, 20, 115103. PDF

    F. C. Wu and Y. J. Chou, 2004 "Tradeoffs associated with sediment-maintainance flushing flow: A simulation approach to exploring noninferior options", River Research and Applications, 20:591-604

    F. C. Wu and Y. J. Chou, 2003 "Simulation of gravel-sand bed response to flushing flows using two-fraction entrainment approach: Model development and flume experiment", Water Resources Research, 39(8):1211, doi:10.1029/2003WR002184.

    F. C. Wu and Y. J. Chou, 2003 "Rolling and lifting probabilities for sediment entrainment", Journal of Hydraulic Engineering, ASCE, 129(2):110-119.

    F. C. Wu, H. W. Shen, and Y. J. Chou, 2001 "Variation of roughness coefficients for unsubmerged and submerged vegetation-Closure", Journal of Hydraulic Engineering, ASCE, 127(3):241-245.

    F. C. Wu, H. W. Shen, and Y. J. Chou, 1999 "Variation of roughness coefficients for unsubmerged and submerged vegetation", Journal of Hydraulic Engineering, ASCE, 125(9):934-942.

    JOURNAL PUBLICATIONS IN PREPARATION

    Y. J. Chou, O. B. Fringer, and J. R. Lacy "Numerical study of bedform evolution under combined wave-current forcing" Jounrnal of Geophysical Research (in preparation).

    Y. J. Chou and O. B. Fringer "An LES-multiphase approach for numerical simulation of particle-laden turbulent flows" International Journal of Multiphase Flows (in preparation).

    CONFERENCE PRESENTATIONS AND TALKS

    Y. J. Chou and O. B. Fringer, 2010 "Numerical Study of Combined Wave-Current Flows over Dynamic Sand Ripples", AGU Ocean Science Meeting, Portland, Oregon.

    Y. J. Chou, 2009 "Applications of Large-Eddy Simulation to Study Sediment Transport and the Resulting Bedform Dynamics" Dept. Civil Engineering, National Taiwan University, Taipei, Taiwan (invited).

    Y. J. Chou, 2009 "Applications of High-Performance Supercomputing in Environmental Flows: from Laboratory Flumes to San Francisco Bay" Dept. Bio-systems Environmental Engineering, National Taiwan University, Taipei, Taiwan (invited).

    Y. J. Chou and O. B. Fringer, 2009 "Numerical Simulation of Turbulence-Induced Bedform Initiation", APS Division of Fluid Dynamics Annual Meeting, Mineapolis, Minnesota.

    Y. J. Chou, 2009 "Numerical simulation of turbulence, sediment transport, and the resulting morphological dynamics" California Institute of Technology, Pasadena, CA.

    Y. J. Chou and O. B. Fringer, 2009 "Numerical simulation of turbulence-induced sediment transport and the resulting bedform dynamics" 2nd Workshop on Turbidity Currents, Santa Barbara, CA.

    Y. J. Chou, O. B. Fringer, and J. R. Lacy, 2008 "Numerical study of sediment suspension over bedforms in combined flows" Poster, AGU Fall Meeting, San Francisco, California.

    Y. J. Chou and O. B. Fringer, 2006 "An unstructured immersed boundary method for simulation of flow over topograpy" Proceedings of the 9th Estuarine and Coastal Modeling Conference, 568-584, Charlston, South Carolina.