Dr. Aksenov explained FlowVision’s current capabilities from base to top after Version 3.09.05

“The FlowVision software package is now used for solving different industrial problems in different parts of the world. Generally, the popularity of FlowVision is based on its capability to solve complex non-tradition problems involving different physical processes.

The paradigm of complete automation of labor-intensive and time-taking processes like grid generation makes FlowVision attractive for many engineers in Russia as well as in the world. Not many solvers or software packages in the world use automated meshing with the guaranty of resolving the surface topology with arbitrary complexity.

We should not forget that FlowVision is completely developer-independent software. It includes an advanced graphical interface, the system for specifying a computational project intuitively as well as the system for flow visualization on planes or on curvilinear surfaces and in volume by means of different methods…. Some are more user friendly and/or advanced than those we usually encounter in scientific publications. Besides that, FlowVision provides tools for calculation of integral characteristics on any surface or volume. Our volume visualization is another feature that makes users happy, but this does not stop us at that point… We keep on working to make the modeling and solution more correct and faster. We have a dedicated team only working to make post processing visualization even better in every release.

If we talk about the basics, FlowVision is based on the finite-volume approach to approximation of the partial differential equations describing fluid motion and accompanying physical processes. It provides explicit and implicit methods for time integration of these equations, all these numerical methods are original from us. To achieve more and more efficient treatment of the problems day by day, we dedicate a large group of scientists to algorithm development.

As mentioned, FlowVision also includes automated generator of unstructured grid with capability of its local dynamic adaptation. Furthermore, the solver involves two-level parallelism which allows calculations on computers with distributed and shared memory (coexisting in the same hardware). Especially our new hybrid AST solver, which is a combination of the aggregative multigrid method (Aggregation AMG), the selective multigrid method (Selective AMG) and the old algebraic solver (TParFBSS), which is designed for large clusters is found to speed up the simulation 38% in average.

The spectrum of physical models in FlowVision… Different turbulence models, models for mass transfer accounting for chemical reactions and radioactive decay, several combustion models, a dispersed phase model, an electro-hydrodynamic model… We also have an original VOF model for tracking moving interfaces, seems traditional but the devil is hidden in details. The turbulence can be simulated within URANS, LES, and ILES approaches, nowadays the latter approaches are highly demanded.

FlowVision simulates fluid motion with velocities corresponding to all possible flow regimes: from incompressible to hypersonic. This is achieved by using an original all-speed velocity-pressure split algorithm for integration of the Navier-Stokes equations. Again, this is an original solution approach developed by FlowVision team in Moscow.

FlowVision enables solving multi-physic problems with use of different modeling tools. For instance, one can simulate multi-phase flows with use of the VOF method, flows past bodies moving across a stationary grid (within Euler approach), flows in rotary machines with use of the technology of sliding grid. Besides that, the software solves fluid-structure interaction problems using the technology of two-way coupling of FlowVision with finite-element codes with conservative (lossless!) data transfer.

We work to deliver good solution approaches for very complex new simulation tasks, and better or faster solutions for the existing tasks. Feedback from every FlowVision user in the world reaches our team and we consider them for our development route.”