Experimental Check of Ivantsov Relation
“… the diffusion field described by [the Ivantsov solution] is based on a dendrite tip which is a parabolic body of revolution, which is true only near the tip itself.” [Glicksman et al. (1995)]
•Proximity of sidearms or other dendrites (especially at low DT)
•Convection driven by density change on solidification
•Residual natural convection in mg
•Container size effects
•Non-axisymmetric deviations from Ivantsov solution
Possible reasons for deviation: