InterPore2018 New Orleans

An ultrasonic study on density and elastic properties of nanoconfined argon

16 May 2018, 09:32

15m

New Orleans

Oral 20 Minutes MS 1.12: Fluids in Nanoporous Media Parallel 6-E

Speaker

Prof. Rolf Pelster (Saarland University, Department of Physics)

Description

We have performed ultrasonic measurements on porous glass filled with liquid capillary condensate. Reducing the vapor pressures induces the formation of concave menisci at the pore ends and enables us to vary the adsorption-induced pore pressure in a controlled way [1,2]. Measuring simultaneously the propagation of longitudinal and transversal waves we evaluate the temperature and the pressure dependency of various quantities. Here we report on changes of the fluid density and of the samples longitudinal modulus. We test different effective medium formulas to obtain information on the intrinsic elastic modulus of the liquid and on its normal pressure at saturation.

[1] K. Schappert and R. Pelster, EPL 105 (2014) 56001
[2] K. Schappert and R. Pelster, J. Phys.: Condens. Matter 29 (2017) 06LT01 (5pp)