Evacuating/Filing Chambers under External Volume Control

This chapter is the second on the section dealing with filling and evacuating chambers. Here the model deals with the case where the volume is controlled by external forces. This kind of model is applicable to many manufacturing processes such as die casting, extraction etc. In general the process of the displacing the gas (in many cases air) with a liquid is a very common process. For example, in die casting process liquid metal is injected to a cavity and after the cooling/solidification period a part is obtained in near the final shape. One can also view the exhaust systems of internal combustion engine in the same manner. In these processes, sometime is vital to obtain a proper evacuation of the gas (air) from the cavity.