# Computational Fluid Dynamics

Computational Fluid Dynamics commonly known as CFD is a computer aided method to predict fluid flows around or within technical systems as well as atmospheric or oceanic flows. The governing equations that have to be solved are derived directly from Newton’s second law and are known as Navier Stokes equation. Obtaining proper solutions from the nonlinear partial differential equations under a given set of initial values and boundary conditions (temperature, pressure or velocity distribution) is challenging but can be handled very well with nowadays available commercial or open source software tools.

We offer the possibility to participate from our deep knowledge and qualifications in CFD methods to raise your product in terms of quality, energy saving, efficiency and reliability. Depending on your specific questions we will choose a well suited software environment to handle your specific problem and find proper answers to your questions. We are able and qualified to handle a wide range of CFD cases and scenarios. That includes simple fluid simulations of duct flows, analysis of complex HVAC scenarios in compartment’s rooms of marine vessels or other offshore facilities to determine pressure, velocity or temperature distribution as well as challenging computations of the turbulent transient flow in the wide range of rotating machines likes compressors, pumps or turbines. Due to the capability of coupling of CFD and structural FEM solvers we are well prepared to handle cases in which vortex induced vibrations (VIV) are the reason for your problems. VIV problems are very well known especially in cases where slender structures like towers, cables or chimneys are exposed to atmospheric flows.

Next to fluid computations we are able to handle aero-acoustic problems as well. Due to the tendency of harder noise regulations it is a fundamental question in the product development cycle to know about the expected noise radiation of your future product as early as possible. The computed unsteady velocity and pressure fields from the fluid simulation will be used to calculate so called acoustic source terms. In the second step the acoustic sources are passed to the acoustic solver to find a solution for the governing acoustic equations. The acoustic modell of choice for most of the cases is an analogy method like the Curle or Ffowcs Williams-Hawkins analogy.