
alfa ghadakam

urappikkal samayat oru metteeriyalinte soolid-liqvid interface tharam pravachikkaan α-factor upayogikkunnu.
reethi.
joonn iii. gruslesky thante microstructure development dure metalkaasting (1996) enna pusthakatthil ingane parayunnu
α = (l/k * te) * (η/v)
ivide l ennathu fusionte lettant heett aanu; k ennathu boltsmante sthiraankamaanu; te ennathu santhulithamaaya freesing thaapanilayaan; η ennathu interface thalatthil oru aattathin ettavum aduthulla ayalkkaarude ennamaanu; v ennathu bulk solidile ettavum adutha ayalkkaarude ennamaanu.
kaaranam l/te = δsf
ivide δsf ennathu metteeriyalinte fusionte mollar entropyaanu.
α = δsf/k (η/v)
martin glixman thante 'principles oof solidification aan aandu aandu moden casting aandu kristtal groth kansepts' (2011) enna pusthakatthil parayunnu
α = δsf/rg (η1/z)
ivide rg ennathu saarvathrika vathaka sthiraankamaanu. (η1/z) mumbathethinu samaanamaan, ellaayppozhum 1/4 <(η1/z) <1.

