DETERMINATION OF THE COMPRESSIBILITY OF AIR IN CASTING MOULD
Authors: *Inegbedion F, Akpobi J.A
The air in the mould during casting is displaced by the liquid metal in a very rapid manner necessitating the need to account for its compressibility. This work has established the compressibility of air in casting mould by using the continuity equation of a controlled volume and the equation of state. From the prediction of air molecule speed using the kinetic energy formula and comparing with the local speed of sound (Mach number), it was established that the Mach number was greater than 1 which shows that the air flow in the casting mould was compressible. Comparing further with experimental results shows that the air in the mould cavity is compressible as it is displaced by the liquid metal filling the cavity.
Affiliations: Department of Production Engineering, Faculty of Engineering, University of Benin, Benin City, Nigeria
Keywords: Compressibility, Continuity Equation, Control Volume, Equation Of State, Mach Number
Published date: 2017/12/29