Welcome to the Chair of

Fluid Systems!

I recently asked a renowned manufacturer of turbo machines if there still is a need for research and vocational training at universities in this field.

My own answer to this question is:

One fifth of all converted electrical output is required for driving fluid systems and is irretrievably lost. Another fifth of the wattage is dissipated through friction in bearings and seals.

Since Leonard Euler recognized the principle of angular momentum in 1775, turbo machines and the individual components of a fluid system are fully developed components with respect to their efficiency. This does not apply to the systems! According to estimates, approximately 25% of dissipation could be avoided simply through improved system design and settings. We see our research focus in the areas of tribology, energy recycling and system integration. We let nature inspire us to find the optimal topology for fluid systems: The energy consumption per unit time of a biological fluid system scales like its mass to the power of ¾. This law applies equally to one-cell organisms as to blue whales. The objective of nature is to reduce weight while maintaining the same structural properties.

Today we are facing the same challenge in respect to mobility. We are working on the areas of energy recovery and system integration in order to design systems more easily and efficiently.

Our strengths are experiments and physical modelling. We adhere to Albert Einstein’s belief that:

Everything should be as simple as possible, but not simpler.

Peter Pelz