8 papers
Instability of stratified two-phase flows in rectangular ducts
Alexander Gelfgat, Neima Brauner
The linear stability of stratified two-phase flows in rectangular ducts is studied numerically. The linear stability analysis takes into account all possible infinitesimal three-di…
Instability of steady flows in helical pipes
Alexander Gelfgat
A parametric numerical study of three-dimensional instability of steady flows in a helical pipe of arbitrary curvature and torsion is carried out. The computations are performed by…
Instability of natural convection in a laterally heated cube with perfectly conducting horizontal boundaries
Alexander Gelfgat
Oscillatory instability of buoyancy convection in a laterally heated cube with perfectly thermally conducting horizontal boundaries is studied. The effect of the spanwise boundarie…
A comparative study on instability of steady flows in helical pipes
Alexander Gelfgat
A computational study of three-dimensional instability of steady flows in a helical pipe of arbitrary curvature and torsion is carried out for the first time. The problem is formul…
Computational modeling of magnetoconvection: effects of discretization method, grid refinement and grid stretching
A. Gelfgat, O. Zikanov
The problem of natural convection in a laterally heated three-dimensional cubic cavity under the action of an externally imposed magnetic field is revisited. Flows at the Rayleigh…
Global Galerkin method for stability studies in incompressible CFD and other possible applications
Alexander Gelfgat
In this paper the author reviews a version of the global Galerkin that was developed and applied in a series of earlier publications. The method is based on divergence-free basis f…