Keywords : unsteady flow


Unsteady Flow to Viscous Thin Films on a Vertical Surface

Khidr M.S. Khidr; Hanin T. Jasim; Hikmat Mustafa

AL-Rafidain Journal of Computer Sciences and Mathematics, 2011, Volume 8, Issue 2, Pages 143-149
DOI: 10.33899/csmj.2011.163656

In this paper we have investigated the unsteady flow to thin films of an incompressible liquids with no inertia force, continuity equation and Nervier-Stokes equations are used to obtain the equation that governs this type of flow, this equation is solved analytically to find the thickness of the film.
 

Stability of Liquid Film with Negligible Viscosity

Hamsa D. Saleem

AL-Rafidain Journal of Computer Sciences and Mathematics, 2005, Volume 2, Issue 1, Pages 11-19
DOI: 10.33899/csmj.2005.164063

In this paper, we consider the stability analysis for a disturbed unsteady flow, which is two-dimensional incompressible flow in a symmetric film where the effect of viscosity can be neglected in comparison with inertia forces. The partial differential equations governing such flow are obtained from the Navier - Stokes equations and we obtain an analytic solution for those equations. The whole system is disturbed and we found the regions where the flow is stable or unstable.