Modelling and Simulation of Lubrication

Recommended Prerequisites

Not applicable.

 

Teaching Methods

Underlying theories and background for models and methods will be demonstrated during ordinary lectures.

The lectures will be accompanied by computer based labs.

Evaluation will based on hand-in assignments and a final oral examination.

Learning Outcomes

Understand the concepts of thin film flow and lubrication theory.

Understanding the underlying basis for thin film flow and lubrication theory and know about limitations.

Have knowledge of the different lubrication regimes.

Have knowledge of the most common models and simulation methods.

Understand the concepts of verification and validation in the context of scientific computations.

Have the ability to select the appropriate model and simulation method for given tribological problems.

Be able to formulate models to simulate tribological contacts operating in boundary, mixed and full film lubrication.

Apply finite differences to solve partial differential equations describing the thin film flow problems.

Implement commonly used models for the numerical simulation of tribological processes.

Be able to verify numerical methods and to validate theoretical models.

Utilize some different common models and simulation methods to carry out parameter studies of lubrication problem.

Work Placement(s)

No

Syllabus

- Lubrication theory – Flows in thin films, the thin film approximation. Reynolds equation.

- The lubrication problem – Governing equations and boundary conditions- Introduction – Why modelling and simulations in tribology? What type of simulations can be made?

- How to solve the equations? Introduction to numerical methods used to solve Reynolds equation, load balance and more.

- An all regimes model – How to model surface roughness effects? The flow factor approach and Contact mechanics of rough surfaces.

- Elastohydrodynamic lubrication (EHL) – Governing equations, numerical techniques

- Wear models and simulation methods

- Modelling of thermal effects in tribology

- Running-in effects in tribology

- Computer labs: Finite difference solver for Reynolds equation, multiphysics tools for tribological simulations, contact mechanics and wear simulations.

Assessment Methods

Assessment
Evaluation will based on hand-in assignments and a final oral examination: 100.0%

Bibliography

Selected book chapters, papers and hand-outs.