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Item type:Publication, Access status: without files , Experimental and numerical investigation of single-phase hydrodynamics in glass sponges by means of combined µPIV measurements and CFD simulation(Elsevier, 2016-11-15); ; ; ; The following paper presents a combined experimental and numerical approach to analyze single-phase hydrodynamics inside porous SiO2 glass sponges (=open-cell foams). For this purpose, a µPIV method has been applied to visualize instantaneous velocity fields of refractive index-matched aqueous Dimethyl sulfoxide (=DMSO) solution flow through the voids of the complex, irregular structure. Results have been recorded for a superficial flow velocity range from 0.02 to 0.38 m/s (corresponding to Reynolds number values between 30 and 650), covering – according to available classifications in literature – all distinguished flow regimes inside such porous systems. µPIV data is used to substantiate the existence of different flow regimes in irregular porous media, to detect their particular flow characteristics and to track the transition points between the prevailing flow regimes. Furthermore, µPIV data has been time-averaged and compared to corresponding numerical results of a laminar, steady-state CFD modelling approach, which is based on reconstructions of the real sponge geometry gained from X-ray tomographic scans of the structure. Experimental and numerical results of pore-scale velocity fields have been compared at three different measurement positions and show good agreement in terms of observed flow structure and direction as well as magnitude of the respective mean velocity fields.Publicationtype: Journal Article98 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , Die Helmholtz‐Energie‐Allianz „Energieeffiziente Chemische Mehrphasenprozesse”︁Energy efficiency is an essential building block of a sustainable economy and an indispensable prerequisite for achieving current international climate goals. The Energy Alliance "Energy efficient multiphase chemical processes" funded by the Helmholtz Association combines expertise and research activities in the field of chemical process engineering with the objective to further develop design tools, numerical and experimental techniques as well as new measurement techniques for increased efficiency of chemical multiphase processes.Publicationtype: Journal Article92