Viscous spreading of non-Newtonian gravity currents in radial geometry
| Autor: | G. Bizzarri, V. Di Federico, Stefano Cintoli |
|---|---|
| Přispěvatelé: | C.A. BREBBIA, Di Federico V., S. Cintoli, G. Bizzarri |
| Jazyk: | angličtina |
| Rok vydání: | 2006 |
| Předmět: |
Physics
Gravity (chemistry) GRAVITY CURRENT Plane (geometry) Constitutive equation Mechanics Geophysics Viscous liquid NON-NEWTONIAN Density current Gravity current Non-Newtonian fluid Self-similar solution Viscous flow SELF-SIMILAR RADIAL FLOW Physics::Fluid Dynamics Flow (mathematics) Volume of fluid method |
| Popis: | A gravity current originated by a power-law viscous fluid propagating in axisymmetric geometry on a horizontal rigid plane below a fluid of lesser density is examined. The intruding fluid is considered to have a pure power-law constitutive equation. The set of equations governing the flow is presented, under the assumption of buoyancy-viscous balance and negligible inertial forces. The conditions under which the above assumptions are valid are examined and a self-similar solution in terms of a nonlinear ordinary differential equation is derived for the release of a fixed volume of fluid. The space-time development of the gravity current is discussed for different flow behavior indexes. |
| Databáze: | OpenAIRE |
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