According to [11], the following parameters are specified for the downhill simplex algorithm: reflection coefficient [alpha] = 1, expansion coefficient [gamma] = 2,
contraction coefficient (used for both - single point and full contractions) [beta] = 0.7, the tolerance parameter [epsilon] = [10.sup.-10] (for (3.5) we have used [epsilon] = [10.sup.-15]).
The copper tubes have been deformed because of the anisotropy in the compressive stresses resulting from the higher thermal
contraction coefficient of aluminum.
When rubber runs through the cooling system, it is being cooled and contracts with
contraction coefficient [micro]<1.
[??](s) has the expression corresponding to Maxwell mechanical model, specifically for plastics, G is the transversal elasticity modulus, K is the compressibility modulus, v is the transversal Poisson
contraction coefficient and [eta] is the constant corresponding to Newtonian component of the Maxwell model.
The LE, linear expansion coefficient (LEC), LC, and linear
contraction coefficient (LCC) were calculated as follows:
The
contraction coefficient [phi] is defined as the ratio of area of contracted jet to the area of tangential port.
[C.sub.c] =
contraction coefficient, the ratio of the jet area at the vena contract a downstream of the bore to the area of the bore itself (dimensionless)
* making a very precise scale model, which should take in consideration in its geometrical dimensions the
contraction coefficient of the cast part alloy.