Friedrich-Alexander-Universität Erlangen-Nürnberg

Projects

Holographic interferometry - Binary diffusion coefficient in gas mixtures

Binary diffusion coefficients of gases and vapors are required to design and optimize technical processes and apparatus, but also to advance the further development of the kinetic theory of gases. By applying holographic interferometry for analyzing the diffusion process in a Loschmidt-cell, binary diffusion coefficients in continue...

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Measurement of Mutual Diffusivities in dense fluids

DLS can be used to measure binary diffusion coefficients in dense fluids if there is a sufficiently large difference in the refractive indices of the pure mixture components. Until the late 1980s, measurements for, e.g., mixtures consisting of continue...

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Thermophysical properties of multi-component refrigerant mixtures

The refrigerant mixtures R507, R404A, R407C, R410A, R417A, and R417B represent long-term substitutes or drop-in solutions for ozone depleting working fluids in refrigeration technology. For these mixtures, thermal diffusivity and sound speed for the saturated liquid and continue...

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Development of a reference fluid for viscosity

For accredited and/or accurate measurements of the viscosity of fluids, most viscometers have to be calibrated with reference fluids. High costs resulting from time consuming calibration procedures with reference materials and their limited stability stimulated the search for an alternative,continue...

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Diffusion modes in fluids close to the critical point

To date, no theory exactly describing the behavior of fluids is available on a physical basis. All theoretical approaches and models require experimental data for their development and validation. The determination of thermophysical properties and especially of transport coefficients by conventional techniques continue...

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Investigating the nature of ionic liquid solvent mixtures by thermophysical properties research

Besides providing accurate data for process design, thermophysical properties research performed in the DLS-Lab for pure ionic liquids (ILs) and their mixtures with solvents allows conclusions regarding fluid structure and molecular interactions continue...

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Application of DLS data for the development and validation of molecular dynamics (MD) simulations

Well-designed experiments are undoubtedly the best method for obtaining reliable and accurate thermophysical property data. Unfortunately, they are often expensive, time-consuming, and restricted to limited temperature and pressure ranges. This constraint has stimulated the development of continue...

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Dynamic Light Scattering in Bio-Medical Applications

With a collaboration of the Institute for Anatomy II, a dynamic light scattering (DLS) experiment was build to evidence the presence of hyaluronan in the aqueous humor (AH) in the eye. As hyaluronan, a polymer of disaccharides, can range in sizes between 5,000 and 20,000 Da, DLS based on  continue...

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