Naslov
Observation of Laser-Induced Microscale Knotted and Unknotted Vortex Filaments on Vaporizing Tntalum Surface

Autori
Lugomer, Stjepan

Izvornik
Physical Review B (0163-1829) 54 (1996), 7; 4488 - 4491

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Laser; Ablation; vortex filaments; Kntted structures; Hopf link

Sažetak
Laser -induced Ta-surface superheating on a ns time scale is connected with the formation of a spinoidal fluid which decomposes into gaseous phase through microexplosions, generating vortex filament structure on the vaporizing surface. Vortex filaments associated with the Reynolds number Re ~ 10e3 - 10e4 are organized into regular, quasiregular, or chaotic structures. Homotopic operations transfer these structures into irreducible ones of a simple closed-loop type, showing that all of them are embedded in a three-dimensional torus either as a vortex ring (unknoted knot), as a cloverleaf (trefoil knoted knot), or as Hopf links (knoted knot).

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA