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Uri Shavit, Associate Professor

Environmental, Water and Agricultural Engineering
Phone: +972-4-829-3568
Fax: +972-4-829-5696
Email: aguri@technion.ac.il
Address: Faculty of Civil and Environmental Engineering Technion - Israel Institute of Technology Haifa 32000, Israel
Home Page: http://piv.technion.ac.il
Research Interests  
Our research group studies transport phenomena in complex, mostly porous, environments. The laboratory, field, and theoretical studies include applications of volume averaging theories, the development of mean flow models, an analysis of solute and particle dispersion, and topics in soil physics, hydrology and biogeochemical processes in streambeds and soils. We use PIV and PLIF in the lab and in the field including a new underwater PIV system for coral reef flow research.

Academic Degrees

1987 -  B.Sc. Technion-IIT
1990 -  M.Sc. Technion-IIT
1994 - Ph.D. Carnegie Mellon University (CMU)

 

Current Courses

Physics of porous medium,
Introduction to flow, transport and pollution in soils, 
Introduction to Hydraulics and Hydrology,
Irrigation Engineering 1,
Turbulence - a reading club

 

Current Graduate Students

Ph.D.
Sharon Moltchanov: Momentum and mass transfer above and through porous regions
Tomer Duman: Flow and Particle transport at porous media interfaces
Ravid Rosenzweig: The effect of biofilms on the hydraulic properties of unsaturated soils

 

M.Sc.
Hannah Bardin: The Role of Soil Drying on the Use of Oxygen Isotopes in Groundwater Research
Shushanna Kington: An Examination of the Isotope Pairing Techniques Using Numerical Simulations of Nitrogen Processes in Sediments

 


 

 

 

 

Journal papers

  • Shaviv, A., Shnek, M., Shavit, U. and Ravina, I., Modeling Nutrients Uptake Considering Sorption Kinematics: P Uptake from One Dimensional Simulated Rhizosphere. J. Plant Nutr., 15, 1099-1114, 1992.

  • Shavit, U. and Chigier, N., Fractal Geometry of Liquid Jets Under Breakup. Fractals, 2(2), 277-281, 1994.
  • Shavit, U. and Chigier, N., The Role of Dynamic Surface Tension in Air Assist Atomization. Physics of Fluids 7 (1), January pp. 24-33, 1995.
  • Shavit, U., Shaviv, A. and Zaslavsky, D., Solute Diffusion Coefficient in the Internal Medium of a New Gel Based Controlled Release Fertilizer. Journal of Controlled Release, 37(1), 21-32, 1995.
  • Shavit, U. and Chigier, N., Fractal Dimensions of Liquid Jet Interface Under Breakup. J. of Atomization and Sprays, 5(6), 525-543, 1995.
  • Shavit, U. and Chigier, N., Development and Evaluation of a New Turbulence Generator for Atomization Research. Experiments in Fluids, 20, 291-301, 1996.
  • Shavit, U., Shaviv, A, Shalit, G. and Zaslavsky, D., Release Characteristics of a New Controlled Release Fertilizer. Journal of Controlled Release, 43, 131-138, 1997.
  • Furman, A. and Shavit, U., Identification of an Underground Salt Pollution Source in The Coastal Plain Aquifer of Israel. Fresenius Environmental Bulletin. 7, 100-107, 1998
  • Shavit, U. and Furman, A., The Location of Deep Salinity Sources in the Israeli Coastal Aquifer. J. of Hydrology, 250, 63-77, 2001.
  • Frenkel, V., Gurka, R., Liberzon, A., Shavit, U., Kimmel, E., Preliminary Investigation of Ultrasound Acoustic Streaming Using Particle Image Velocimetry. Ultrasonics, 39, 153-156, 2001.
  • Shavit, U., Gas Liquid Interaction in the Liquid Breakup Region of Twin Fluid Atomization. Experiments in Fluids, 31, 550-557, 2001.
  • Shavit, U., Bar-Yosef, G., Rosenzweig, R., and Assouline, S., Modified Brinkman Equation for a Free Flow Problem at the Interface of Porous Surfaces: The Cantor- Taylor Brush Configuration Case. Water Resources Research, 38(12), 1320-1334, 2002.
  • Shavit, U., Reiss, M., and Shaviv, A., Wetting Mechanisms of Gel-Based Controlled -Release Fertilizers. Journal of Controlled Release, 88(1), 71-83, 2003.
  • Shavit, U., Moltchanov, S., and Agnon, Y., Particles resuspension in waves using visualization and PIV measurements - coherence and intermittency. International Journal of Multiphase Flow, 29, 1183-1192, 2003.
  • Master, Y., Laughlin, R. J., Shavit, U., Stevens, R. J. and Shaviv A., The effect of secondary effluent irrigation on gaseous nitrogen losses. Journal of Environmental Quality, 32(4), 1204-1211, 2003.
  • Abbo, H., Shavit U., Markel, D. and Rimmer, A. A numerical study on the influence of fractured regions on lake / groundwater interaction; the Lake Kinneret Case. Journal of Hydrology, 283(1-4), 225-243, 2003.
  • Shavit, U., Rosenzweig, R., and Assouline, S., Free Flow at the Interface of Porous Surfaces: Generalization of the Taylor Brush Configuration. Transport in Porous Media, (54), 345–360, 2004.
  • Farber, E., Vengosh, A., Gavrieli, I., Marie, A., Bullen, T.D., Mayer, B., Holtzman, R., Segal, M., and Shavit U., The origin and mechanisms of salinization of the Lower Jordan River. Geochimica et Cosmochimica Acta, 68(9), 1989–2006, 2004.
  • Lahav O, Lu Y, Shavit U, and Loewenthal RE. Modeling H2S(g) emission rates in gravity sewage collection systems. Journal of Environmental Engineering- ASCE 130 (11): 1382-1389, 2004.
  • Segal-Rozenhaimer, M., Shavit, U., Holtzman, R., Vengosh, A., Farber, E., Gavrieli, I., Bullen, T., Mayer, B., and Shaviv, A., Nitrogen Pollutants, Sources and Processes along the Lower Jordan River. Journal of Environmental Quality, 33, 1440-1451, 2004.
  • Assouline S. and Shavit U. Effects of Management Policies, Including Artificial Recharge, on the Salinization Process in a Coastal Aquifer. Water Resources Research, 40 (4): Art. No. W04101 April 2004.
  • Holtzman, R., Shavit, U., Segal-Rozenhaimer, M., Gavrieli, I., Marei, A., Farber, E., and Vengosh, A. Quantifying Ground Water Inputs along the Lower Jordan River. Journal of Environmental Quality, 34(3): 897-906, 2005.
  • Master, Y., Shavit, U., and Shaviv, A., Modified Isotope Pairing Technique to Study N Transformations in Polluted Aquatic Systems: Theory, Environmental Science & Technology, 39 (6): 1749-1756, 2005.
  • Kremen, A., Bear, J., Shavit, U., and Shaviv, A., A model demonstrating the potential for coupled nitrification denitrification in soil aggregates, Environmental Science & Technology, 39 (11): 4180-4188, 2005.
  • Farber, E., Vengosh, A., Gavrieli, I., Marie, A., Bullen, T.D., Mayer, B., Holtzman, R., Segal, M., and Shavit, U., Management scenarios for the Jordan River salinity crisis, Applied Geochemistry, 20 (11): 2138-2153 2005.
  • Shavit, U., Lowe, R.J., and Steinbuck J.V., Intensity Capping: a simple method to improve cross-correlation PIV results, Experiments in Fluids 42(2): 225-240, 2007.
  • Farber, E., Vengosh, A., Gavrieli, I., Marie, A., Bullen, T.D., Mayer, B., Polak, A., and Shavit, U. The geochemistry of groundwater resources in the Jordan Valley: impact of the Rift Valley brines. Applied Geochemistry 22 (3): 494-514, 2007.
  • Rosenzweig, R., and U. Shavit, The laminar flow field at the interface of a Sierpinski carpet configuration, Water Resources Research, 43, W10402, 2007.
  • Lowe R.J., Shavit U., Falter J.L., Koseff J.R. & Monismith S.G., “Modeling flow in coral communities with and without waves: a synthesis of porous media and canopy flow approaches,” Limnology and Oceanography, 53(6): 2668-2680, 2008.
  • Shavit, U., A preface for a Special Issue on 'Transport phenomena at the interface between fluid and porous domains', Transport in Porous Media, 78(3), 327-330, 2009.
  • Duman, T. and Shavit, U., An apparent interface location as a tool to solve the porous interface flow problem, Transport in Porous Media, 78(3), 509-524, 2009.

Mass T., Genin A., Shavit U., Grinstein M., Tchernov D., Flow enhances photosynthesis in marine benthic autotrophs by increasing the efflux of oxygen from the organism to the water, accepted for publication in Proceedings of the National Academy of Sciences (PNAS), 2010. Download
Rosenzweig, R., Shavit, U., and Furman, A., The Influence of Biofilm Spatial Distribution Scenarios on Hydraulic Conductivity of Unsaturated Soils, Vadose Zone Journal, 17: 1080–1084, 2009. Download
 
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