film pressure

film pressure

[′film ‚presh·ər]
(physics)
The difference between the surface tension of a pure liquid and the surface tension of the liquid with a unimolecular layer of a given substance adsorbed on it. Also known as surface pressure.
References in periodicals archive ?
The reason is that once the film thickness h at a position changes, the film pressure will alter correspondingly to maintain continuity.
The precession motion of the journal is induced by residual unbalance of the rotor and generates a hydrodynamic squeeze film pressure distribution that applies reaction forces over the journal, providing the damping force to attenuate the transmitted forces and in turn reducing the rotor vibration.
Among other assumptions these approaches typically neglected the interaction between the lubrication film pressure distribution and the structural deflection.
Given the experimental film pressure distributions shown in Figure 2, numbers 2 and 3 bearing pads are loaded, whereas numbers 1 and 4 bearing pads are unloaded.
where P is the oil film pressure, h is the modified thickness of oil film, [rho] is the oil density, [eta] is the dynamic viscosity of the oil, [v.sub.t] is the tangential velocity, and t is time.
The precession motion of the journal is induced by residual unbalance of the rotor and generates a hydrodynamic squeeze film pressure distribution that exerts reaction forces over the journal, providing the damping force to attenuate the transmitted forces and in turn reducing the rotor vibration.
Although shaft center eccentricity cannot be calculated here for bearing-neutral positions that were not accurately defined, relative shaft orbits of the textured bearings are available, which indirectly demonstrates that reasonable texture could change oil film pressure and result in more dense shaft orbits (see Figure 6).
The C04TB1 face collar increases stiffness, prevents the shaft or bushings from moving side-to-side, and preloads opposing thin film pressure, maintaining the perfect gap and tolerances.
Tenders are invited for Double-Barrier Langmuir-Blodgett (Lb) Trough With Lb Film Pressure Measurement An Deposition System For Investigating The Properties Of Floating Monolayers, Precise Deposition Of Mono/ Multilayers Onto Solid Substrates Or Simply As Platforms For Use
These stakeholders have vowed to continue to push forward the recyclability side of film pressure labels.
In this particular case such negative values occur only for gas-like isotherms, that is, in situations when the film pressure is almost zero for small relative deformations.