William W. Liou, Ph.D.
Title: Advanced
Digital Hydraulic
Principal Investigator: William W. Liou
Co-Principal Investigator:
Peter Gustafson, John Bair
Sponsor: Eaton Corporation
Period: 2009-2010
Component simulations and reliability of hydraulic hybrid drive system.
Title: Ground
Vehicle Fatigue Modeling, Blast Wave Simulation, Sensor Data Analysis, and
Structural Optimization for Reliability, Safety and CBM
Project Director: William W. Liou (CAViDS)
Sponsor: Tank Automotive
Research Development and
Period: 2009-2010
Title: Dual-Use
Ground Vehicle Conditional-Based Maintenance
Project Director: William W. Liou (CAViDS)
Sponsor: Tank Automotive
Research Development and
Period: 2009-2010
Title: Dual-Use
Ground Vehicle Reliability Prediction and Optimazation,
Tank Elastomer Pads Fatigue, and Vehicle Occupant
Shock Wave Impact Load Prediction
Project Director: William W. Liou (CAViDS)
Sponsor: Tank Automotive
Research Development and
Period: 2009-2010
Title:
Physics-Based Wall Layer Modeling for Large Eddy Simulations of Flows over
Rough Wall
Principal Investigator: William W. Liou
Sponsor: Office of Naval Research (ONR),
Period: 2008-2010
Surface roughness poses a major challenge to numerical simulations. This is particularly serious for direct simulations such as large eddy simulation (LES) and direct numerical simulation (DNS). In comparison with the abundance of research on LES wall models for smooth walls, there have been significantly less efforts that focus on developing mathematical modeling for rough walls. New flow physics-based surface roughness modeling for LES numerical calculations of the high Reynolds number flow over rough surfaces are to be developed.
Title: Aerothermal Simulations of the L-3 AVDS Engine Cooling Fan
Principal Investigator: William W. Liou
Sponsor:CAViDS Consortium
Period: 2008-2009
Computational simulations of the aerothermal characteristics of cooling fan unit.
Title: Continuous
Monitoring Wireless and Communication Devices for Blood Glucose
Principal Investigator: Murali Ghantasala
Co-Principal Investigator: Ajay Gupta, William W. Liou
Sponsor: WMU Research Foundation, OVPR Technology Development
Fund, and the
Period: 2008
Title: CFD
Studies of Truck Clutch Housing
Principal Investigator: William W. Liou
Sponsor:CAViDS Consortium
Period: 2007-2008
Computational simulations of the flow in truck clutch housing.
Title: CFD of
Air Flow in Automotive Intake Air Ducts
Principal Investigator: William W. Liou
Sponsor:CAViDS Consortium
Period: 2007
Computational simulations of the flow in automotive intake ducts
Title:
Simulations of Oil Flow in Heavy-Duty Tandem Axle
Principal Investigator: William W. Liou
Sponsor:CAViDS Consortium
Period: 2007-2008
Computational simulations of the oil flow in commercial truck axle.
Title: Heavy
Truck Rollover Characterization
Principal Investigator: William W. Liou
Sponsor: National Transportation Research Center, Inc,
Period: 2007-2008
Title: Simulation-Based Heavy-Duty Truck
Structural Reliability Analysis, Track Pin Bushing Fatigue, and
HMMWV Underbody
Scanning
Project Director: William W. Liou (CAViDS)
Sponsor: Tank Automotive
Research Development and
Period: 2007-2008
Title: Airfoil Flow Control Using Flexible Extended Trailing Edge
Principal Investigator: Tianshu Liu
Co-Principal Investigator: William W. Liou, Qamar Shams
Sponsor: Air Force Office of Scientific Research (AFOSR),
Period: 2006-2009
The proposed research will study a feasible physical mechanism for flow separation control (or stall control) of an airfoil section and a wing at high angles of attack using a flexible, extended trailing edge of polymer membrane embedded with micro-electromechanical systems (MEMS) sensors and actuators.
Title: Capillary
Effects in Multilayered Micro Porous Media
Principal Investigator:
Peter Parker
Co-Principal Investigator: William W. Liou
Sponsor: Procter & Gamble Company
Period: 2007-2009
Rigid capillary dewatering removes water from paper web without compaction of the fiber furnish. The surface wetting through the multilayered structure of porous media with distributed micron-sized pores will be studied.
Title: New Rough
Wall Layer Modeling Using the Brinkman’s Equation
Principal Investigator: William W. Liou
Sponsor: Office of Naval Research (ONR), U.S. Navy
Period: 2005-2008
Surface roughness exists on many Naval vehicle platforms. Compared to the flow over smooth surfaces surface roughness influence the flow structures in the turbulent boundary layer around the platform and causes the increases of drag and wall heat transfer. In this study, the fluid dynamics of the flow over rough wall will be examined using model Brinkman’s equation.
Title: Turbine Engine Laboratory Enhancement for Aero-Propulsion
Education
Principal Investigator: William W. Liou
Sponsor: Michigan Space Grant Consortium
Period: 2004-2005
To enrich the undergraduate aeropropulsion curriculum, a student-centered effort to build a miniturbojet engine was initiated. The student group consists of two undergraduates majoring in aeronautical engineering. The engine selected is the WREN 54 turbojet engine, which delivers 12lb of thrust at 160,000 RPM. The activities involve (1) building the engine hardware and the test stand and (2) develop data acquisition system for the engine. The group has assembled all of the engine components. The entire setup is successfully completed in September 2003 and has been used for the Aeropropulsion System class (AAE466) at Western Michigan University in Fall 2003. During each of the engine runs, the students (seniors) are responsible for starting and operating the engine, monitoring engine status and recording data. In this proposal, we seek supplementary funding to support an enhancement of the mini-turbojet engine that we have built with an add-on turbofan unit.
Title: Simulations of Flow Transition over Underwater Bodies
Principal Investigator: William W. Liou
Sponsor: Office of Naval Research (ONR), U.S. Navy
Period: 2002-2003
The transition of flow from a laminar state to a turbulent state impacts directly the hydrodynamic and the acoustic characteristics of both manned and unmanned underwater vehicles. It is relevant to several Future Naval Capabilities (FNC), such as Platform Protection, Littoral Antisubmarine Warfare, and Electrical Warship and Combat Vehicles. Numerical computations of the transitional flow over the HiFoil lifting surface of the Office of Naval Research will be performed by using the Reynolds-average Navier-Stokes equations and transition models. The study is expected to provide information such as expectable variation of flow transition between water-tunnel testing and the actual operation environment.
Title: DSMC Simulations of Laminar Flow Breakdown on Space Transport Systems
Principal Investigator: William W. Liou
Sponsor: NASA Langley Research Center
Period: 2001-2004
Transitional boundary layers are believed to have caused high thermal fluxes at the surface of reentry vehicles. The increased heat transfer can have a significant impact on the aerodynamic design and the thermal protection system of high speed RLV. Direct Simulation Monte Carlo (DSMC) method is a well-established method and has been used extensively in the simulations of rarefied gas flows over reentry vehicles. In this activity, the DSMC method is used for studying the breakdown of laminar flows over RLV types of space transport systems.
Title: Unified LES/RANS Approach Using the Conservation Element and Solution Element (CE/SE) Method
Principal Investigator: William W. Liou
Sponsor: NASA Glenn Research Center
Period: 2001-2002
The CE/SE method, which is originated at NASA Glenn Research Center, represents a revolutionary development in the field of computational fluid dynamics (CFD). By invoking both the integral and the differential dorms of the Navier-Stokes equations, the CE/SE method enforces the conservation of fluxes in spaces and time in a unified manner. The method is a first-of-the-kind in applying the concept of space-time flux conservation, which is at the root of the Navier-Stokes equations, as a foundation to construct a CFD method. The goal of the research is to develop an advanced large eddy simulations (LES) capability for complex problems using the CE/SE method.
Title: Bursting Frequency Prediction in Turbulent Boundary Layers
Principal Investigator: William W. Liou
Sponsor: Sandia National Laboratories, U.S. Department of Energy
Period: 1999-2002
Experimental results have shown that the development of turbulent boundary layers is dominated by coherent streamwise structures. The research seeks to predict the bursting frequency of such events in incompressible as well as compressible turbulent boundary layers using the direct resonance theory.
Title: Heat Transfer in Micro-Electro-Mechanical-System (MEMS)
Principal Investigator: William W. Liou
Sponsor: Michigan Space Grant Consortium
Period: 2000-2001
In most MEMS devices, the mean free path of the molecules is of the same order of magnitude as the system size. The Knudsen number for the fluid flows in such devices is high and the fluid motions are in the transitional regime. This research seeks to achieve a better understanding of the heat transfer phenomena in MEMS using two different approaches: (1) the Burnett Equations; (2) Direct Simulations Monte Carlo Simulations.
Title: Calculation of the Flow Transition and Separation over Two-Dimensional Multi-Element Airfoils
Principal Investigator: William W. Liou
Sponsor: NASA Langley Research Center
Period: 1998-2000
High-lift aerodynamics has been a critical element in the design of civil as well as military aircrafts. The cascade arrangement of the multi-element airfoil creates mutual flow interference between the elements. Phenomena such as flow transition from laminar to turbulent and flow separation interact strongly. Understanding and predicting these complex flow phenomena are not only fundamentally important to fluid sciences but also critical in the search for an increased margin of efficiency for multi-element airfoil. This research involves the computational study of these phenomena.
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