Abstract
In this paper experimental results are presented for the flow of elasticoviscous fluids in thin films held between parallel horizontal circular flat plates. Specifically, we consider the case when the plates are forced to separate by an applied load. The results are discussed in the context of lubrication properties as well as from a fundamental fluid mechanics point of view. On the theoretical side, existing analyses are discussed in the context of the present experimental study. Recent theories are considered, with particular emphasis placed on the effect of including the plate inertia in the corresponding analyses. It is found that the theories predict opposing results and that most are not capable of even qualitative agreement with the present experimental results and those published earlier by other authors. One theory, however, does provide qualitative agreement with experimental findings in both the standard squeeze-film flow and the flow considered in the present report, when the Deborah number is not too large. The attempt to include the plate inertia in some of the existing analyses does not meet with success since physically unrealistic results are obtained.
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