Load-estimation techniques for unsteady incompressible flows

An overset-grid method for 3D unsteady incompressible flows

A composite-grid numerical method is developed for simulating unsteady, three-dimensional (3D), incompressible flows in complex geometries. The governing equations are solved using a second-order accurate, finite-volume method based on the dual time-stepping artificial compressibility approach. Overset grids are employed to discretize arbitrarily complex geometries, and a new interface algorith...

Essentially Compact Schemes for Unsteady Viscous Incompressible Flows

A new 4th order accurate finite difference scheme for the computation of unsteady viscous incompressible flows is introduced. The scheme is based on the vorticitystream function formulation. It is essentially compact and has the nice features of a compact scheme with regard to the treatment of boundary conditions. It is also very efficient, at every time step or Runge-Kutta stage, only two Pois...

Application of a Pseudo Penalization Method for Incompressible Unsteady Flows

Application of a Pseudo Penalization Method for Incompressible Unsteady Flows Computational fluid dynamics is an extensive research area since the fluid flows have vital importance in large number of applications in today’s engineering world. This thesis report presents an application of a new method which is developed to compute the solutions of incompressible flows around bluff bodies. This s...

Projection Methods for the Calculation of Incompressible Unsteady Flows

A general formula for the second-order projection method for solution of unsteady incompressible Navier-Stokes equations is presented. It includes the fourand three-step projection methods. Also, RKCN (Runge-Kutta=Crank-Nicholson) three-step and four-step projection methods are presented, in which the three-stage Runge-Kutta and semi-implicit Crank-Nicholson techniques are employed to update th...

On Unsteady Flows of Implicitly Constituted Incompressible Fluids