Research Repository

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A coupled 1D film hydrodynamics and core gas flow model for air-oil flows in aero-engine bearing chambers (2017)
Conference Proceeding
Kakimpa, B., Morvan, H., & Hibberd, S. (2017). A coupled 1D film hydrodynamics and core gas flow model for air-oil flows in aero-engine bearing chambers

A robust 1D film hydrodynamic model has been sequentially coupled with a 1D core gas model and used to predict the instantaneous mean core gas speed, film interface shear stress and liquid film distribution within an idealised bearing chamber. This n... Read More

Dynamics of a small gap gas lubricated bearing with Navier slip boundary conditions (2017)
Journal Article
Bailey, N., Hibberd, S., & Power, H. (in press). Dynamics of a small gap gas lubricated bearing with Navier slip boundary conditions. Journal of Fluid Mechanics, 818, doi:10.1017/jfm.2017.142. ISSN 0022-1120

A gas lubricated bearing model is derived which is appropriate for a very small bearing face separation by including velocity slip boundary conditions and centrifugal inertia effects. The bearing dynamics are examined when an external harmonic force... Read More

A multi-layer integral model for locally-heated thin film flow (2017)
Journal Article
Kay, E., Hibberd, S., & Power, H. (2017). A multi-layer integral model for locally-heated thin film flow. Journal of Computational Physics, 336, doi:10.1016/j.jcp.2017.01.066. ISSN 0021-9991

Based on an approach used to model environmental flows such as rivers and estuaries, we develop a new multi-layered model for thin liquid film flow on a locally-heated inclined plane. The film is segmented into layers of equal thickness with the velo... Read More

Effect of possible rotor deformation on the probability of face contact for a liquid film bearing (2016)
Journal Article
Bailey, N., Hibberd, S., & Power, H. (2017). Effect of possible rotor deformation on the probability of face contact for a liquid film bearing. Tribology International, 109, doi:10.1016/j.triboint.2016.12.032. ISSN 0301-679X

The possibility of face contact is examined for a coaxial rotor-stator bearing in dynamic motion constrained by a highly rotating very thin liquid film. A modified Reynolds equation for pressurised flow is coupled to the bearing structure leading to... Read More

The depth-averaged numerical simulation of laminar thin-film flows with capillary waves (2016)
Journal Article
Kakimpa, B., Morvan, H., & Hibberd, S. (2016). The depth-averaged numerical simulation of laminar thin-film flows with capillary waves. Journal of Engineering for Gas Turbines and Power, 138(11), doi:10.1115/1.4033471. ISSN 0742-4795

Thin-film flows encountered in engineering systems such as aero-engine bearing chambers often exhibit capillary waves and occur within a moderate to high Weber number range. Although the depth-averaged simulation of these thin-film flows is computati... Read More

Inertial effects on thin-film wave structures with imposed surface shear on an inclined plane (2016)
Journal Article
Sivapuratharasu, M., Hibberd, S., Hubbard, M. E., & Power, H. (2016). Inertial effects on thin-film wave structures with imposed surface shear on an inclined plane. Physica D: Nonlinear Phenomena, 325, doi:10.1016/j.physd.2016.03.008. ISSN 0167-2789

This study provides an extended approach to the mathematical simulation of thin-film flow on a flat inclined plane relevant to flows subject to high surface shear. Motivated by modelling thin-film structures within an industrial context, wave structu... Read More

A depth-averaged model for non-isothermal thin-film rimming flow (2013)
Journal Article
Kay, E., Hibberd, S., & Power, H. (2014). A depth-averaged model for non-isothermal thin-film rimming flow. International Journal of Heat and Mass Transfer, 70, doi:10.1016/j.ijheatmasstransfer.2013.11.040. ISSN 0017-9310

A model for non-isothermal shear-driven thin-film flow on the inside surface of a stationary circular cylinder is presented. Motivated by an application to film flow in an aero-engine bearing chamber the model extends lubrication theory analysis of t... Read More