coefficient of viscosity

Among the experiments themselves are to determine the wavelength of monochromatic light (sodium light) by Newton's ring, to determine the specific rotation of cane sugar solutions using half-shade polarimeter, to verify Stefan's Law by electric method using a vacuum diode, to determine the energy band gap of a given extrinsic semi-conductor material by thermal variation using a four probe method, and to determine the coefficient of viscosity of a water by Meyer's disc method.

where Y (t) is the loosen modulus, Y (t) = E[e.sup.-Et/[eta]], [eta] is the coefficient of viscosity (Gpa*h), and t is the time (h).

Two different sets of experiments were performed to determine the variation of coefficient of viscosity with temperature and the shear rate.

[13] investigated the pressure coefficient of melt viscosity using a high-pressure sliding plate rheometer (HPSPR) and capillary rheometers with driven piston and nitrogen counter-pressure to control the capillary exit pressure; they found that the pressure coefficient of viscosity, [??], agreed fairly well with data from different laboratories and instruments.

where a = [gamma]/[[mu].sub.[infinity]] and [T.sub.r] = [T.sub.[infinity]] -1/[gamma], is the fluid temperature, [mu] is the coefficient of dynamic viscosity, [[mu].sub.[infinity]] is the coefficient of viscosity at the free stream, a, [T.sub.r] and [gamma] are constants whose values depend on the reference state and the thermal property of the fluid.