Seminár z kvalitatívnej teórie diferenciálnych rovníc - Peter Guba (10.12.2015)
vo štvrtok 10.12.2015 o 14:00 v miestnosti M/223
Prednášajúci: doc. RNDr. Peter Guba, PhD.
Názov prednášky: Nonlinear convection in ternary mushy layers
Termín: 10.12.2015, 14:00 hod., M/223
Abstrakt:
We consider a model for convection and primary solidification of a ternary alloy.
A previous linear theory identified, for the case of vanishing latent heat,
solute rejection and background solidification, a direct mode of convective instability
when all the fields (thermal and two solutal) were individually statically stable.
A weakly nonlinear development of this instability is examined in detail.
A phase-change-induced double-diffusive mechanism of pattern selection is identified.