 |
Weicheng Lo Associate Professor Office: 4691, Building of
Department of Hydraulic and Ocean Engineering |
Education |
| Experience | ||
| Teaching | ||
| Research | ||
| Awards | ||
| Service | ||
| Publications | ||
| Research projects | ||
| Research team |
|
|
Weicheng Lo Associate Professor Office: 4691, Building of
Department of Hydraulic and Ocean Engineering |
Education |
| Experience | ||
| Teaching | ||
| Research | ||
| Awards | ||
| Service | ||
| Publications | ||
| Research projects | ||
| Research team |
Education
2003 Ph.D. Civil and Environmental Engineering, University of California at Berkeley 1996 M.S. Civil and Environmental Engineering, Cornell University 1993 B.S. Hydraulic and Ocean Engineering, National Cheng Kung University
Experience
08/2008 - present Associate Professor, Department of Hydraulic and Ocean Engineering, National Cheng Kung University
06/2006 - 12/2009 Guest Scientist, Earth Sciences Division, Lawrence Berkeley National Laboratory
02/2005 - 07/2008 Assistant Professor, Department of Hydraulic and Ocean Engineering, National Cheng Kung University
11/2003 - 01/2005 Postdoctoral Fellow, Earth Sciences Division, Lawrence Berkeley National Laboratory
07/2000 - 08/2003 Graduate Student Research Assistant, Earth Sciences Division, Lawrence Berkeley National Laboratory
08/1999 - 06/2000 Graduate Student Researcher, Department of Civil and Environmental Engineering, University of California at Berkeley
Teaching
Dr. Lo teaches graduate courses on Two-phase fluid flows in deformble porous media, Advanced groundwater hydrology (Vadose zone hydrology) [syllabus and course reader], and Seminar, as well as undergraduate courses on Fluid mechanics (I) [syllabus and course reader], Fluid mechanics (II), and Applied Mechanics.
Research
Modeling multiphase flow and transport in elastic porous media
Remediation of groundwater aquifers and enhanced oil recovery
Wave propagation and attenuation through an elastic porous medium containing two immiscible compressible viscous fluids
Dynamic response of unsaturated poroelastic media to acoustic wave stimulation
Continuum mechanics of mixtures
Awards
"Emerging Star" Award, College of Engineering, National Cheng Kung University, 2007, 2008, 2009
High-ranking Paper Award, College of Engineering, National Cheng Kung University, 2007, 2008, 2009
Excellent Research Award, College of Engineering, National Cheng Kung University, 2007, 2008, 2009
Excellent Teaching Award, Department of Hydraulic and Ocean Engineering, National Cheng Kung University, 2008
Distinguished Young Engineer, Chinese Water Resources Management Society, 2007
Laboratory Directed Research and Development Grant, Lawrence Berkeley National Laboratory
Fellowship, Department of Civil and Environmental Enginnering, University of California at Berkeley
Li Kuo Wei and Rong Mu Yung Fellowship, University of California at Berkeley
Dr. and Mrs. James C, Y. Soong Fellowship, University of California at Berkeley
Service
Vice Secretary, Kaohsiung branch, Chinese Institute of Engineers
Board Member, Foundation of Hydraulic and Ocean Engineering Research
Member: American Geophysical Union
Reviewer: Advances in Water Resources; Applied Mathmatical Modelling; Journal of Hydrology; Journal of Mechanics of Materials and Structures; Journal of Sound and Vibration; Transport in Porous Media; Water Resources Research;
Publications
Archival Journal Paper
Year 2010
[11] Lo, W. C., G. Sposito, E. Majer, and C. L. Yeh, Motional modes of dilatational waves in elastic porous media containing two immiscible fluids, Advances in Water Resources, Accepted. (SCI) (IF = 2.235, Rank: 4/60 in Water Resources)
Year 2009
[10] Lo, W. C., G. Sposito, and E. Majer, (2009), Analytical decoupling of poroelasticity equations for acoustic wave propagation and attenuation in a porous medium containing two immiscible fluids, Journal of Engineering Mathematics, 64(2), 219-235. (SCI) (Invited, Special Issue - Applying Mathematics to Flow in Porous Media). (SCI) (NSC: 95-2211-E-006-062) (IF = 0.69, Rank: 36/68 in Engineering, Multidisciplinary) [PDF, Copyright 2009 Springer]
Year 2008
[9] Lo, W. C. (2008), Propagation and attenuation of Rayleigh waves in a semi-infinite unsaturated poroelastic medium, Advances in Water Resources, 31, 1399-1410. (SCI) (NSC: 95-2211-E-006-062) (IF = 2.235, Rank: 4/60 in Water Resources) [PDF, Copyright 2008 Elsevier ]
[8] Lo, W. C., C. L. Yeh, and C. D. Jan, (2008), Effect of soil texture and excitation frequency on the propagation and attenuation of acoustic wave at saturated conditions, Journal of Hydrology, 357, 270-281. (SCI) (NSC: 95-2211-E-006-062) (IF = 2.305, Rank: 3/91 in Civil Engineering) [PDF, Copyright 2008 Elsevier ]
Year 2007
[7] Lo, W. C., C. L. Yeh, and C. T. Tsai, (2007), Effect of soil texture on the propagation and attenuation of acoustic wave at unsaturated conditions, Journal of Hydrology, 338, 273-284. (SCI) (NSC: 95-2211-E-006-062) (IF = 2.305, Rank: 3/91 in Civil Engineering) [PDF, Copyright 2007 Elsevier ]
[6] Lo, W. C., G. Sposito, and E. Majer, (2007), Low-frequency dilatational wave propagation through unsaturated porous media containing two immiscible fluids, Transport in Porous Media, (Invited, Special Issue - Vadose Zone Dynamics and the Legacy of Wilford R. Gardner), 68, 91-105. (SCI) (IF = 0.772 Rank: 61/116 in Engineering, Chemical) [PDF, Copyright 2007 Springer]
[5] Jan, C. D., T. H. Chen, and W. C. Lo (2007), Effect of rainfall intensity and distribution on groundwater level fluctuations, Journal of Hydrology, 332 (3-4), 348-360. (SCI) (IF = 2.305, Rank: 3/91 in Civil Engineering) [PDF, Copyright 2007 Elsevier ]
Year 2006
[4] Lo, W. C., (2006), Decoupling of the coupled poroelastic equations for quasistatic flow in deformable porous media containing two immiscible fluids, Advances in Water Resources, 29 (12), 1893-1900. (SCI) (NSC: 94-2211-E-006-062) (IF = 2.235, Rank: 4/60 in Water Resources) [PDF, Copyright 2006 Elsevier ]
[3] Lo, W. C., G. Sposito, and E. Majer, (2006), Low-frequency dilatational wave propagation through fully-saturated poroelastic media, Advances in Water Resources, 29 (3), 408-416. (SCI) (IF = 2.235, Rank: 4/60 in Water Resources) [PDF, Copyright 2006 Elsevier ]
Year 2005
[2] Lo, W. C., G. Sposito, and E. Majer, (2005), Wave propagation through elastic porous media containing two immiscible fluids, Water Resources Research, 41, W02025, (20 pp.). (SCI) (IF = 2.398, Rank: 2/60 in Water Resources) [PDF, Copyright 2005 AGU ]
Year 2002
[1] Lo, W. C., G. Sposito, and E. Majer, (2002), Immiscible two-phase fluid flows in deformable porous media, Advances in Water Resources, (Invited, Special Issue - 25 Years of Advances in Water Resources), 25 (8-12), 1105-1117. (SCI) (IF = 2.235, Rank: 4/60 in Water Resources) [PDF, Copyright 2002 Elsevier ]
Preprint
[3] Yu, H. W, C. H. Chen, W. C. Lo* , A novel study on the mechanical behavior of the soil-root system, in review, Soil Science. (* Corresponding author)
[2] Lo, W. C., C. H. Chen, C. L. Yeh, and Y. S. Chen, Analytical solution for the dynamic response of a saturated poroelastic half-space to harmonic stress loading, Journal of Hydrology.
[1] Chen, Y. S., W. C. Lo, J. M., Leu, Alexander H. D. Cheng, Effect of impermeable boundaries on the propagation of Rayleigh waves in an unsaturated poroelastic half-space, Journal of Mechanics. (The first author is the Ph.D. student.)
Invited Book Chapter
[1] Lo, W. C., G. Sposito, and E. Majer, (2003), Immiscible two-phase fluid flows in deformable porous media, 25 Years of Advances in Water Resources edited by C. T. Miller, M. B. Parlange, and S. M. Hassanizadeh, Elsevier, pages 245-257.
Research projectsModeling Multiphase Flow and Transport in Deformable Porous Media
The mathematical description of multiphase fluid transport through deformable porous media is a problem of great practical importance to subsurface hydrology, including within its purview diverse applications to underground waste containment, enhanced recovery of petroleum, aquifer remediation, and seismic phenomena in geological formations and unconsolidated earth materials. At the heart of this description lies a physical understanding of linear momentum balance based on the thermomechanical behavior of an elastic solid framework permeated by compressible viscous fluids. This behavior, in turn, depends on the thermomechanical properties of the individual phases and on the coupling that exists among them because of mutual interactions. The continuum theory of mixtures provides a rigorous theoretical approach for describing multiphase systems from a strictly macroscopic viewpoint. Although coupling mechanisms have been successfully represented in the mixture theory, the constitutive coefficients necessary for feasibly modeling them still remain elusive. In addition, constitutive relationships currently developed for describing interfacial properties and thermodynamic processes at the macroscopic scale are only based on a conceptual picture and are not physically restricted by thermodynamic principles, which require taking explicit account of interfacial effects on the entropy inequality both in respect to thermodynamic potentials and the saturation constraint. To address these issues, a rational generalization of theory for multiphase flow and transport in deformable porous media will be established.
Ultrasonic and Seismic Measurements of Hydrological and Geophysical Parameters in Shallow Subsurface Zones
Accurate mapping of subsurface hydrological parameters, such as permeability, porosity, and fluid saturation, is central to characterizing the subsurface distribution and flow of fluids. These parameters are usually measured or inferred from well tests or core samples. Results interpolated from well data can be inaccurate and misleading. Traditional borehole sampling obtains only local hydrologic data and is an invasive method because it disturbs in-situ environments and, in turn, creates new contaminant pathways. It has been widely recognized that strong changes in acoustic wave velocity and attenuation can provide qualitative clues to explore subsurface physical properties. We shall develop a general mathematical model of poroelasticity for the analysis of dilatational wave motions in unsaturated porous media. A numerical simulation will be taken up later to study the influence of hydraulic and elastic parameters on the phase velocity and attenuation coefficient of different modes of dilatational waves as functions of excitation frequency and fluid saturation in geological media bearing different fluid mixtures. In parallel with theoretical and numerical developments, laboratory experiments will be performed to validate theoretical predictions. Understanding the physical mechanisms controlling elastic wave propagation and attenuation through fluid-containing porous media is also important in applying emerging technologies of seismic wave stimulation for groundwater remediation and hydrocarbon recovery.
12/08/2009