Question

Which of the following relations is given by chvorinov for the solidification time of a casting?

(a) ts = k(V/SA)^2

(b) ts = k(V/SA)

(c) ts = k(V*SA)^2

(d) ts = k(V/SA)^3

I got this question in my homework.

Origin of the question is Riser Design in section Pattern and Mould, Principles of Gating & Risering of Casting-Forming-Welding I

Answer 1

The correct option is (a) ts = k(V/SA)^2

For explanation I would say: Chvorinov scientist has shown that the solidification time of a casting is directly proportional to the square of the ratio of volume-to-surface area of the casting and the constant of proportionality is known as mould constant. His relation is given by:                                                                                ts = k(V/SA)^2, where ts = solidification time, V = volume, SA = surface area, k = mould constant.