פרופ' עמוס אולמן

ביה"ס להנדסה מכנית סגל אקדמי בכיר
פרופ' עמוס אולמן
טלפון פנימי: 03-6407829
פקס: 03-6407334
משרד: וולפסון הנדסה, 210

תחומי מחקר

הנדסת סביבה: שיטות הפרדה על בסיס מעבר חומר. טיפול בקרקעות מזוהמות. שיטות מיצוי מתקדמות. זרימה דו-פאזית. מעבר חום וחומר. הגברת קצבי מעבר חום על ידי הפרדת פאזות נוזל-נוזל. פינוי חום מרכיבים אלקטרוניים. הגדרת איברי מקור לפיזור מזהמים.  אגירת אנרגיה בצורת אוויר דחוס.

Research Interests

Current Projects:

  • Mass transfer separation processes (innovative methods of extraction and absorption).
  • Remediation of contaminated soil sediments and sludge.
  • Liquid-Liquid two-phase flow.
  • Heat Transfer - heat transfer during liquid-liquid phase separation, free convection. Energy storage.
  • Air pollution control devices and pollutant source term determinations.

Publications

SCIENTIFIC PUBLICATIONS

ARTICLES

H. Kalman, A. Ullmann and R. Letan, "Visualization Studies of a Freon-113 Bubble Condensing in Water", J. Heat Transfer, Vol. 109, pp. 543-545, 1987.

A. Ullmann and R. Letan, "Effect of Noncondensibles on Condensation and Evaporation of Bubbles", J. Heat Transfer, Vol. 111, pp. 1060-1067, 1989.

A. Ullmann and H. Kalman, "Efficiency and Optimized Dimensions of Annular Fins of Different Cross-section Shapes", Int. J. Heat Mass Transfer, Vol. 32, No. 6, pp. 1105-1110, 1989.

A. Ullmann, Z. Ludmer, and R. Shinnar, "Phase Transition Extraction Process Using Solvent Mixtures with a Critical Point of Miscibility", AIChE Journal, Vol. 41 (3), pp. 488-500, 1995.

A. Ullmann, Z. Ludmer, and R. Shinnar, "Novel Continuous Multistage Extraction Column Based on Phase Transition of Critical-Solution Mixtures", Chemical Engineering Science, Vol. 52 (4), pp. 567-581, 1997.

A. Ullmann and A. Dayan, "Exhaust Volume Model for Dust Emission Control of Belt Conveyor Transfer Points", Powder Technology, Vol. 96/2, pp. 139-147, 1998.

A. Ullmann, “The Piezoelectric Valveless Pump Performance Enhancement Analysis”, Sensors & Actuators: A. Physical, Vol. 69/1, pp. 97-105, 1998.

H. Kalman and A. Ullmann,” Experimental Analysis of Bubble Shape During Condensation in Miscible and Immiscible Liquids”, Journal of Fluids Engineering, Vol. 121, pp. 496-502, 1999.

A. Dayan, S. Zalmanovich and A. Ullmann, "Measurements of Solid Contaminants  Emission Rates from Boiling Pools", Chemical Engineering Science Vol. 55, pp. 2203-2212, 2000.

A. Dayan, A. Ullmann and S. Zalmanovich, "Measurements of Solid Particles Suspension Concentration in Boiling Pools", Nuclear Engineering and Design Vol. 199, pp. 203-214, 2000.

Y. Ullmann, R. Kremer, Y. Ramon, J. Berger, A. Ullmann, I.J. Peled, “Evaluation of the Validity of “Haifa” Formula for Fluid Resusciation, in Burn Patients, at “Rambam” Medical Center”, Annals of Burns and Fire Disasters, Vol. XIII(4), pp. 206-121, 2000.

A. Ullmann, I. Fono and Y. Taitel “The Piezoelectric Valveless Pump – Dynamic Model”, Journal of Fluid Engineering, Vol. 123(1) pp. 92-98, 2001.

D. Goder, H. Kalman and A. Ullmann, “Fatigue Characteristics of Granular Materials”, Powder Technology, Vol. 122 (1), pp. 19-25, 2002.

N. Brauner, and A. Ullmann, “Modeling of Phase Inversion Phenomenon in Two-Phase Pipe Flow”, Int. J. Multiphase Flow, Vol. 28, pp. 1177-1204, 2002.

A. Dayan, R. Kushnir and A. Ullmann. “Laminar Free Convection underneath a Hot Horizontal Infinite Strip”. Int. J. Heat Mass Transfer, Vol. 45, pp. 4021-4031, 2002.

A. Ullmann and I. Fono, “The Piezoelectric Valve-Less Pump - Improved Dynamic Model”, Journal of Microelectromechnical Systems, Vol. 11 No. 6, pp. 655-664, 2002.

M. Haim, Y. Weiss, H. Kalman and A. Ullmann, “The Effect of The Inlet Conditions on the Numerical Solution of Particles-Gas Flow” Advanced Powder Technology, Vol. 14 No. 1, pp. 87-110 , 2003.

N. Brauner, and A. Ullmann, “Prediction of the holdup in liquid slugs”, Trans. of the Institute of Fluid Flow Machinery, No 112, pp. 75-90, 2003.

A. Ullmann, M. Zamir, Z. Ludmer and N. Brauner, “Stratified Laminar Countercurrent Flow of Two Liquid Phases in Inclined Tubes” Int. J. Multiphase Flow Vol. 29, pp. 1583-1604, 2003.

A. Ullmann, M. Zamir, S. Gat and N. Brauner, “Multi-Holdups in Co-Current Stratified Flow in Inclined Tubes” Int. J. Multiphase Flow Vol. 29, pp. 1565-1581, 2003.

O. Braunshtein, H. Kalman and A. Ullmann, “Performance and Optimization of Composed Fin Arrays” Heat Transfer Engineering, Vol. 25 No. 4 pp. 4-12, 2004.

N. Brauner, and A. Ullmann, “Modeling of Gas Entrainment from Taylor Bubbles: Part A: Slug Flow”, Int. J. Multiphase Flow Vol. 30, pp. 239-272, 2004.

N. Brauner, and A. Ullmann, “Modeling of Gas Entrainment from Taylor Bubbles: Part B: A Stationary Bubble” Int. J. Multiphase Flow Vol. 30, pp. 273-290, 2004.

A. Ullmann, A. Goldstein, M. Zamir and N. Brauner, ”Closure relations for the Shear Stresses in Two-Fluid Models for Laminar Stratified Flow”, Int. J. Multiphase Flow, 30(7-8) 877-900, 2004.

A. Dayan, R. Kushnir, G. Mitelman and A. Ullmann “Laminar Free Convection Underneath a Downward Facing Hot Fin Array”, Int. J. Heat Mass Transfer, Vol. 47, pp. 2849-2860, 2004.

A. Ullmann and N. Brauner, ”Closure relations for the Shear Stresses in Two-Fluid Models for Core-Annular Flow” Multiphase Science and Technology, Vol.16, 4, pp.355-387, 2004.

G.A. Pinhasi, A. Ullmann and A. Dayan, "Modeling of Flashing Two-Phase Flow", Reviews in Chemical Engineering, Vol. 21, pp. 133-264, 2005.

A. Ullmann, A. Goldstein and N. Brauner, ”Gas-Liquid and Liquid-Liquid Stratified Flows: Exact Analytical Solutions and Mechanistic Models", Transactions of the Institute of Fluid-Flow Machinery, No.117, pp. 59-79, 2005.

A. Ullmann and N. Brauner,”Closure Relations for Two-Fluid Models for Two-Phase Stratified Smooth and Stratified Wavy Flows", Int. J. Multiphase Flow, Vol. 32, pp. 82-105, 2006.

A. Ullmann, M. Zamir, R. Abudu and Z. Ludmer, "Flow Phenomena and Flooding Limitations in a Phase Transition Extraction Column", Chemical Engineering Science Vol. 61, pp. 3806-3817, 2006.

A. Ullmann and N. Brauner "The Prediction of Flow Pattern Maps In Mini Channels", Multiphase Science and Technology, Vol. 19, pp. 49-73, 2007.

 G. Mittelman, A. Dayan, K. Dado-Turjeman and A. Ullmann "Laminar Free Convection Underneath a Downward Facing Inclined Hot Fin Array", Int. J. Heat Mass Transfer, Vol. 50, pp. 2582-2589, 2007.

G.A. Pinhasi, A. Ullmann and A. Dayan "1D Plane Numerical Model for Boiling Liquid Expanding Vapor Explosion (BLEVE)", Int. J. Heat Mass Transfer ,Vol. 50, pp 4780–4795, 2007.

R. Kushnir, A. Ullmann and A. Dayan "Steady Periodic Gas Flow Around a Well of a CAES Plant Operation", Transport in Porous Media, Vol. 73 (1) pp. 1–20, 2008.

A. Ullmann, S. Gat, Z. Ludmer and N. Brauner "Phase Separation of Partially Miscible Solvent Systems: Flow Phenomena and Heat and Mass Transfer Applications" Reviews in Chemical Engineering, Vol. 24 (4-5) pp. 159-262, 2008.

S. Gat, N. Brauner and A. Ullmann "Heat Transfer Enhancement Via Liquid-Liquid Phase Separation", Int. J. Heat Mass Transfer, Vol. 52 pp. 1385-1399, 2009.

Z. Ludmer, T. Golan, E. Ermolenko, N. Brauner and A. Ullmann "Simultaneous Removal of Heavy Metals and Organic Pollutants from Contaminated Sediments and Soil by a Novel Technology, Sediments Remediation Phase Transition Extraction (SR-PTE)", Environmental Engineering Science, Vol. 26 (2) pp. 419-430, 2009.

R. Kushnir, A. Ullmann and A. Dayan "Compressed Air Flow within Aquifer Reservoirs of CAES Plants", Transport in Porous Media, Vol. 81(2) pp. 219–240, 2010.

G. L. Xu, G. Z. Zhang, G. Liu, A. Ullmann, N. Brauner "Trapped water displacement from low sections of oil pipelines", Int. J. Multiphase Flow, Vol. 37, pp. 1-11, 2011.

R. Kushnir, A. Ullmann and A. Dayan, “Thermodynamic Models for the Temperature and Pressure Variations within Adiabatic Caverns of Compressed Air Energy Storage Plants”, ASME Journal of Energy Resources Technology, Vol. 134, 021901-1, 2012.

R. Kushnir, A. Ullmann and A. Dayan,” Thermodynamic and Hydrodynamic Response of Compressed Air Energy Storage Reservoirs: A Review”. Reviews in Chemical Engineering, Vol. 28, pp. 123-148, 2012.

R. Kushnir, A. Dayan and A. Ullmann “Temperature and Pressure Variations within Compressed Air Energy Storage Caverns”. Int. J. Heat Mass Transfer, Vol. 55(21-22), pp. 5616-5630, 2012.

V. Segal, A. Ullmann and N. Brauner, “Modeling of Phase Transition of Partially Miscible Solvent Systems: Hydrodynamics and Heat Transfer Phenomena” Computational Thermal Sciences, Vol. 4(5), pp. 387-398, 2012.

A. Ullmann, N. Brauner, S. Vazana,  Z. Katz, R. Goikhman, B. Seemann, H. Marom and M. Gozin, “New Biodegradable Organic-Soluble Chelating Agents for Simultaneous Removal of Heavy Metals and Organic Pollutants from Contaminated Media”, J. of Hazardous Materials, Vol. 260, pp. 676-688, 2013.

T. Golan, G. Dahan, Z. Ludmer, N. Brauner and A. Ullmann “Heavy Metals Extraction with the SRPTE Process from Two Matrices – Industrial Sludge and River Sediments”. Chemical Engineering Journal, Vol. 236, pp.47-58, 2014.

A. Ullmann, K. Maevski and N. Brauner "Enhancement of Forced and Free Convection Heat Transfer Rates by Inducing Liquid-Liquid Phase Separation of a Partially-Miscible Equal-Density Binary Liquid System". Int. J. of Heat and Mass Transfer, Vol. 70, pp. 363-377, 2014.

R. Kushnir, V. Segal, A. Ullmann, N. Brauner “Inclined Two-Layered Stratified Channel Flows: Long Wave Stability Analysis of Multiple Solution Regions”. Int. J. Multiphase Flow, Vol. 62, pp. 17-29, 2014.

A. Ullmann, and Y. Taitel, “The Piezoelectric Valve-Less Pump - Series and Parallel Connections” Journal of Fluids Engineering, Vol.137 pp.021104-1-9, 2015.

A. Mandel, E. Stern, A. Ullmann, N. Brauner, "Setting threshold values of particle sizes for determination of the appropriate dispersion/deposition model during various atmospheric stability conditions", Atmospheric Environment, Vol. 105 pp. 181-190, 2015.

A. Ullmann, P. Poesio and N. Brauner “Enhancing heat transfer rates by inducing liquid-liquid phase separation: Applications and modelling" Interfacial Phenomena and Heat Transfer", Vol. 3(1), pp. 41-67, 2015.

A. Goldstein, A. Ullmann, and N. Brauner “Characteristics of Stratified Laminar Flows in Inclined Pipes”, Int. J. Multiphase Flow, Vol. 75, pp. 267-287, 2015.

I. Barmak, A. Gelfgat, H. Vitoshkin, A. Ullmann, and N. Brauner “Stability of stratified two-phase flows in horizontal channels”, Physics of Fluids, Vol 28, pp.044101-1-25, 2016.

I. Barmak, A. Yu. Gelfgat, A. Ullmann, and N. Brauner “Stability of stratified two-phase flows in inclined channels”, Physics of Fluids, Vol 28, pp.084101-1-26, 2016.

G. Xu, L. Cai, A. Ullmann and N. Brauner “Experiments and simulation of water displacement from lower sections of oil pipelines”, Journal of Petroleum Science and Engineering, , Vol. 147, pp. 829-842, 2016.

I. Barmak, A. Yu. Gelfgat, A. Ullmann, and N. Brauner “On the Squire’s transformation for stratified two-phase flows in inclined channels”, Int. J. Multiphase Flow, Vol. 88, pp. 142-151, 2017.

W. Xing, A. K. Vutha , X. Yu, A. Ullmann, N. Brauner, Y. Peles, “Liquid/liquid phase separation heat transfer at the microscale”, Int. J. Heat Mass Transfer, Vol. 107, pp. 53-65, 2017.

A. Mandel, E. Stern, A. Ullmann and N. Brauner, "Pollutant ground concentrations of non-neutrally buoyant particles", Risk Analysis, Vol. 37(12) pp. 2435-2454, DOI: 10.1111/risa.12800, 2017.

A. Goldstein, A. Ullmann and N. Brauner, "Exact Solutions of Core-Annular Laminar Inclined Flows", International Journal of Multiphase Flow, Vol. 93, pp. 178-204, 2017.

D. Picchi, P. Poesio, A. Ullmann, and N. Brauner "Characteristics of stratified flows of Newtonian/non-Newtonian shear-thinning fluids", International Journal of Multiphase Flow, Accepted, 2017.

R. Kushnir, V. Segal, A. Ullmann, N. Brauner, “Closure relations effects on the prediction of the stratified two-phase flow stability via the two-fluid model”. International Journal of Multiphase Flow, Vol. 97, pp.78-93, 2017.

D. Picchi, I. Barmak, A. Ullmann, and N. Brauner, “Stability of stratified two-phase channel flows of Newtonian/non-Newtonian shear-thinning fluids”, Int. J. Multiphase Flow, available on line, 2017.

D. Picchi, A. Ullmann, and N. Brauner, “Modelling of core-annular and plug flows of Newtonian/non-Newtonian shear-thinning fluids in pipes and capillary tubes”, Int. J. Multiphase Flow, available on line, 2018.

M. Magnini, A. Ullmann, N. Brauner, J. R. Thome, "Numerical study of water displacement from the elbow of an inclined oil pipeline", Journal of Petroleum Science and Engineering, available on line, 2018.

 

Additional Articles

Y. Ullmann, L. Fodor, I. Schwarzberg, N. Carmi, A. Ullmann and Y.  Ramon, “The sounds of music in the operating room”, Injury, Vol. 39, pp. 592-597, 2008. 5 year Impact factor: 2.348, Times cited: 11

G. L. Xu, G. Z. Zhang, N. Brauner, A. Ullmann, G. Liu, and X. Zhang  "Interface profile in oil-dragging-water pipeline system", Journal of China University of Petroleum (Edition of Natural Science, ISSN 1673-5005), Vol. 35, pp. 124-129, 2011, in  Chinese.

A. Shapira,G.A., Pinhasi, and A. Ullmann (2013) “Risk Assessment Model for Toxic Material Release: Haifa Ammonia Storage Case Study”, Ecology and Environment, 4 (3), 209-2011, 2013, in Hebrew.

 

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