ISOTHERMAL SQUEEZE FILMS
Abstract
A derivation is presented of the equation governing the pressure in a thin, flat film of ideal gas under isothermal conditions, when the surfaces bounding the film are in relative normal and tangential motion. When tangential motion is absent, the pressure equation reduces to a nonlinear heat equation, which admits of very few closed-form solutions. Various approximation methods are discussed, and two problems involving small periodic variation of the gap between parallel plates are solved by perturbation method for a film in which fluid inertia is negligible.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 22, 1961
- Accession Number
- AD0261094
Entities
People
- W. E. Langlois
Organizations
- International Business Machines Corporation (Armonk, NY)