Journal: Scientific Reports

Article Title: Particle movements provoke avalanche-like compaction in soft colloid filter cakes

doi: 10.1038/s41598-021-92119-w

Figure Lengend Snippet: Evolution of a filter cake of 27 \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\upmu }$$\end{document} μ m sized PEG microgels inside a microfluidic PDMS channel during constant pressure filtration. The lines in ( a ) indicate the cake surface at the respective time. Visualization of the local cake movements by microgel rearrangement with avalanche-like network movements ( b ), and single-particle movements ( c ). We overlaid the filter cake surface at that respective time as a blue line and the porous filtration structure in white for better orientation. Illustration of the two types of rearrangement occurring in the filter cake ( d ). Position of the rearrangements (blue dots) in the filter cake at the respective filtration time and the filter cake thickness (black squares) ( e ).

Article Snippet: Filtration experiments are executed in dead-end mode using a microfluidic constant pressure pump (Elveflow OB1 MK3) and an additional microfluidic pressure sensor Elveflow MPS1 at the chip inlet.

Techniques: Filtration, Single Particle

Journal: Scientific Reports

Article Title: Particle movements provoke avalanche-like compaction in soft colloid filter cakes

doi: 10.1038/s41598-021-92119-w

Figure Lengend Snippet: Cake thickness during pressure stepping experiment. Experimental procedure of the applied transmembrane pressure (TMP) steps ( a ). Light microscopy image of the microfluidic membrane channel and the filter cake during pressure step 1 ( b ). Cake compression relative to the initial thickness \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\frac{h_1-h_i}{h_1}$$\end{document} h 1 - h i h 1 of an uncompressed and a previously compressed filter cake during pressure stepping experiments ( c ).

Article Snippet: Filtration experiments are executed in dead-end mode using a microfluidic constant pressure pump (Elveflow OB1 MK3) and an additional microfluidic pressure sensor Elveflow MPS1 at the chip inlet.

Techniques: Light Microscopy, Membrane