Computations of Droplet/Flow Interactions In Sprays.
Abstract
The behavior of liquid fuel drops is studied by numerical simulations. The Navier-Stokes equations are solved by a finite difference/front tracking technique that allows resolution of inertial and viscous forces as well as the inclusion of surface tension at the deformable boundary between the fuel and the air. Two- and three-dimensional simulations are used to determine how the lift and the drag depend on the shear rate of the fluid. The deformation of the drops play a major role and while a nearly spherical drop experiences lift in the same direction as a solid particle, relatively modest deformation can lead to a lift force in the opposite direction. To examine more complex problems, a new three-dimensional code has been written that allows local grid refinement and the use of cylindrical coordinates. This code has been used to examine the development of three-dimensional disturbances during the primary breakup of jets. At finite amplitude the three-dimensional disturbance can dominate the two-dimensional one and lead to "fiber" breakup
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 29, 1997
- Accession Number
- ADA353983
Entities
People
- Gretar Tryggvason
Organizations
- University of Michigan