Fluid Dynamic Measurement Technologies: Optical and Nanophotonic Methods

Dear Colleagues,

In order to optimise the performance of components interacting with fluids, be it in a gas or liquid, a turbine blade in an aircraft engine, or even a newly installed mechanical heart valve, we must first understand the interaction between the fluid and that component. To understand, we must first measure. Even when running purely numerical fluid dynamic simulations, we require data to validate our methodology and assumptions. Again, these data come from measurements. A famous quote by Lord Kelvin (June 26, 1824–December 17, 1907) summarises the important role of measurements in the advancement of science:

“When you can measure what you are speaking about, and express it in numbers, you know something about it, when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind; it may be the beginning of knowledge, but you have scarcely, in your thoughts advanced to the stage of science.”

Therefore, to measure and ultimately optimise our designs, we must develop and apply high-resolution measurement technologies that can bridge the current gap between numerical simulations and experimental testing through high sampling rates and fine resolutions. This will enable future breakthroughs in component performance whilst significantly reducing the costs and timescales associated with component development and testing.

The goal of this Special Issue is to bring together the state-of-the-art in fluidic measurement technologies and highlight the advancements that have been made in traditional/conventional approaches whilst also identifying areas with the greatest potential for future development. These advancements can be in the setup itself, novel ways of processing or post-processing data, or the introduction of new configurations to existing methods.

An area where submissions are strongly encouraged is that of optical and nano-engineered approaches such as PSP, TSP, and PIV with nanoparticles. This is a tremendously exciting and rapidly growing field of research. Incorporating nanoscale photonics into fluid flow measurements is a radical new approach that has the potential to redefine what is possible in flow diagnostics.

Dr. Hossein Zare-Behtash
Dr. Esmaeil Heydari
Guest Editors

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