 Butterfly Valves Ball Valves / Spherical Valves Plunger Valves Slide Valves Needle Valves Air Valves CFD

Computational fluid dynamics (CFD) is one of the branches of fluid mechanics that uses numerical methods and algorithms to solve and analyze problems that involve fluid flows. Computers are used to perform the millions of calculations required to simulate the interaction of fluids and gases with the complex surfaces used in engineering. Even with simplified equations and high-speed computers.

Design and Usage

Development of valves components including inlet and outlet pipes.  Accurate prediction of flow characteristics.  For renovation projects our CFD tools help us to find areas for improvement.

Tools Used

3D Euler simulation for runner blade design, loss analysis in hydraulic passages, performance prediction of entire turbine, including the interaction of rotating and stationary components. 3D multiphase, time dependent Navier-Stokes calculations to asses flows through a Valve. 3D time dependent Navier-Stokes simulation to study interaction between the rotating & stationary components of a valve.”

FEM

The finite element method (FEM) (sometimes referred to as finite element analysis) is a numerical technique for finding approximate solutions of partial differential equations (PDE) as well as of integral equations. The solution approach is based either on eliminating the differential equation completely (steady state problems), or rendering the PDE into an approximating system of ordinary differential equations, which are then solved using standard techniques such as Euler's method, Runge-Kutta, etc.

In solving partial differential equations, the primary challenge is to create an equation that approximates the equation to be studied, but is numerically stable, meaning that errors in the input data and intermediate calculations do not accumulate and cause the resulting output to be meaningless. There are many ways of doing this, all with advantages and disadvantages. The Finite Element Method is a good choice for solving partial differential equations over complex domains, when the domain changes (as during a solid state reaction with a moving boundary), when the desired precision varies over the entire domain, or when the solution lacks smoothness. “           