Department of Physical Hydrodynamics

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Department of Physical Hydrodynamics Laboratory of Multiphase Medium and Cumulation Laboratory of Vortex Flows Laboratory of High-Energy Processes

Laboratory of Multiphase Medium and Cumulation Staff: Professors – 4, Doctors – 3 -Experimental and theoretical investigations of dynamics of complex rheological multiphase mediums: Investigation of wave dynamics in bubble mediums; - Study of fragmentation’s mechanisms of liquid, liquid like and multiphase mediums (suspensions, emulsion, pastes, gels, polymers, abyssal system and so on).

Simulation of explosive eruption of volcano Method of hydrodynamic shock tubes (two possible location of diaphragms)

Dynamic method of micro-inhomogeneities study Electro-magnetic hydrodynamic Shock Tube Free surface Cavitation zone near free surface as result of shock wave reflection from free surface. System of shock waves generated by cavitation bubbles, cumulative jet formation. Laser flash, time of exposure is 3 nsec.

Liquid drop fracture at shock wave loading Shock wave (SW) is generated by pulse magnetic field. SW parameters: +3s, Pfr 15 MPa t=0 60 s Cavitation zone development in a liquid drop (D=1 cm) 70 s t50 s

Later stage of cavitative fracture t1,5 msec a b Liquid drop fragmentation under short shock loading

Structure dynamics of GRA-drop at quasi-static decompression (cold support) t= 3 30 50 60 70 90 sec

HIGH-ENERGY DENSITY PHYSICS LABORATORY Head of Laboratory – Dr. Prof HIGH-ENERGY DENSITY PHYSICS LABORATORY Head of Laboratory – Dr. Prof. Gennady A. Shvetsov Staff: 18 2 professors 6 senior researchers (Ph. D.)

BASIC ACTIVITIES Conversion of explosion energy to electromagnetic energy Electromagnetic acceleration of solids Development of new composite low-erosion materials Shaped-charges

ELECTROMAGNETIC RAIL LAUNCHERS OF SOLIDS Plasma Armature Rail-gun: 1 is an energy source, 2 are electrodes, 3 is the accelerated dielectric body, 4 is a foil, 5 are insulators, 6 is a shell, 7 and 8 are switches.

ELECTROMAGNETIC RAIL LAUNCHERS OF SOLIDS 1-4: plasma armature velocity 5: projectile velocity 6: theoretical velocity Why ?? Erosion of materials! new materials for pulsed power and industrial applications explosive welding explosive compaction of powders m = 1,3 g Vmax = 7,4 km/sec

DISRUPTION OF SHAPED-CHARGE JETS BY A PULSED CURRENT Diagram of experiments: 1 shaped charge; 2 source of electromagnetic energy; 3 electrodes; 4 inductive probes for measuring the current and the derivative of the discharge current; 5 sites of X-ray photography.

DISRUPTION OF SHAPED-CHARGE JETS BY A PULSED CURRENT X-ray photographs of shaped-charge jets without a current (on the left) and with a current (on the right) recorded at various times.