Biot number behaviour in the Chill Block Melt Spinning (CBMS) process

M. PAGNOLA; M. MALMORIA; M. BARONE

APPLIED THERMAL ENGINEERING

PERGAMON-ELSEVIER SCIENCE LTD

Lugar: Amsterdam; Año: 2016 vol. 103 p. 807 - 811

1359-4311

This paper shows the change obtained in the Biot number (Bi) during the adhesion interface and the contactbetween phases, where the cooling and solidification of the ribbon obtained by the CBMS processoccurs. This change shows an increase in the number of Bi according to the tangential velocity of the copperwheel (Vx) in the pressure range of the tests that define the ejection speeds in the nozzle (Vo).The present study demonstrates that a zone where Vo is close to 2 m/s appears, and a transition of theBis/l numbers from magnitudes below unity until this value is exceeded can be observed.In this study, the Bis/l > 1 values indicate that Newtonian cooling occurs during the ribbon?s solidificationprocess and show that the convective forces on the external part of the solidifying mass begin toinfluence the amount of heat transferred during the liquid/solid phase in the adhesion zone.