Abstract
This paper commemorates Ramsey Gohar by acknowledging his contributions to the fields of contact mechanics and elastohydrodynamic lubrication (EHL) within the context of the developments of these subjects. A historical discourse is provided on elastohydrodynamics, from its inception in the 1940s to present. We demonstrate that Ramsey Gohar was not only a pioneer in the discoveries and fundamentals of the subject, but also led or contributed significantly to continual advances in the understanding of EHL and its diverse applications.
Highlights
Dr Ramsey Gohar was one of the pioneers in the field of elastohydrodynamic lubrication (EHL)
In the late 1950s, Ramsey worked on gyroscopes in the research laboratories of General Electric, which inspired his lifelong interest in rigid body dynamics
Detailed analyses of EHL contacts under steady state and transient conditions with various formulation and solution methods were provided comprehensively by Ramsey [72,73]. He verified his various solutions for the EHL of circular [9,21,69] and elliptical [24,66] point contacts with his earlier optical interferometric studies
Summary
Dr Ramsey Gohar was one of the pioneers in the field of elastohydrodynamic lubrication (EHL). Improved manganin micro-transducers with active element dimensions of 5 × 10 μm and thickness between 100–300 Å were developed through RF sputtering of bulk manganin powder, under high vacuum at Imperial College They were used for line contact conditions in roller bearings or in a disc machine [38,39,40,41]. Detailed analyses of EHL contacts under steady state and transient conditions with various formulation and solution methods were provided comprehensively by Ramsey [72,73] He verified his various solutions for the EHL of circular [9,21,69] and elliptical [24,66] point contacts with his earlier optical interferometric studies. Some researchers have employed alternative methods of formulation and solution, including finite elements, the complementarity approach or computational fluid dynamics (CFD) [86,87,88,89], including an early contribution by Ramsey and his co-workers [90]
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