Gravity currents 4 Power-law liquid 4 Power-law liquids 4 Rheology 4 Approximation theory 2 Axisymmetric flow 2 Circular cavity 2 Diffusion 2 Eigenvalues 2 Eigenvalues and eigenfunctions 2 Flow of fluids 2 Fluid mechanics 2 Governing equations 2 Gravitation 2 Gravity waves 2 Integral curves 2 Liquids 2 Lubrication 2 Lubrication approximations 2 Nonlinear diffusion 2 Nonlinear eigenvalue problem 2 Nonlinear equations 2 Nonlinear systems 2 Numerical integrations 2 Numerical methods 2 Phase plane 2 Physical variables 2 Rheological indices 2 Self-similar 2 Self-similar solution 2