Emeriti

Name	Discipline/Position	Phone	Office	E-Mail	Home Page
Barkat Zalman	Astrophysics and Relativity	02 6586 857	Popick 120
Rakavy Gideon	Astrophysics and Relativity	02 6584 234	Popick 118
Stein Josef	Astrophysics and Relativity	02 6584 806	Popick 109
Lichtenstadt Itamar	Astrophysics and Relativity	02 6584 491	Popick 107
Goldberg Isser	Biophysics and Interdisciplinary Research	02 6584 491	Popick 107
Tikochinsky Yoel	Biophysics and Interdisciplinary Research	02 6586 884	Yoel Tikochinsky
Wagschal Jehudah	Biophysics and Interdisciplinary Research	02 6584 521	Popick 105
Ron Akiva	Biophysics and Interdisciplinary Research	02 6586 885	Popick 109
Gutfreund Hanoch	Biophysics and Interdisciplinary Research	02 6584 802	Kaplun 109
Zevin Vilen	Condensed Matter Physics	02 6584 592	Danciger B 219

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Upcoming Events

Tuesday, November 30th

Special Nonlinear Physics Seminar: "Settling and collisions of ice crystals in turbulent clouds"
- Start time: 12:00pm
- End date: Tuesday, November 30th
- End time: 01:30pm
- Lecturer: Alain Pumir, Laboratoire de Physique, Ecole Normale Supérieure de LyonAbstract:Small non-spherical ice crystals in clouds settle through a turbulent fluid. As they settle, they can orient themselves, which in turn affects radiation reflection. They can also collide with each other, which leads to aggregation, and to the formation of larger size particles (such as grauples). I will present the results of a theoretical and numerical study of the problem. The first issue I will discuss concerns the forces and torques acting on small crystals as they move through the fluid, and in particular the importance of fluid inertia to orient the crystals. The dependence of the orientation on the geometric properties of the crystals and on the turbulence intensity can be summarized as an elementary phase diagram. Finally, our results concerning the probability of collisions between ice crystals point to several mechanisms that can bring particles together. Aside from the classical effect induced by the turbulent velocity gradient, the difference in settling velocities between crystals with different orientations can significantly contribute to the collision rate, along with the effect of particle inertia (“sling effect”).
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Thursday, December 2nd

HE Astrophysics Seminar | Ofek Birnholtz (Bar-Ilan University)
- Start time: 01:00pm
- End date: Thursday, December 2nd
- End time: 02:00pm
- View this event in Google Calendar