Understanding the Instability of Particle-Laden Liquids Over Soft Porous Media
Abstract
Major Goals: The major goals of the proposed project are to quantitatively examine the suspension flows over porous media models (porous structures) and the related instabilities by developing and experimentally validating a new framework to model and understand the stability of the flow of particle-laden liquids in a rectangular channel in which one or two walls are coated with various porous media. The proposed concept, inspired by the nearly frictionless movement of red blood cells through tiny capillaries, involves covering the planar surfaces with specific porous material with permeability and porosity. The specific objectives of the proposed project are aimed at achieving our major goal of developing and experimentally validating a new theoretical framework to model and understand this coupled flow and the causes of instability in the system. In Objective no. 1, the plan was to consider the pressure-driven channel flow of non-Brownian, non-colloidal particle laden liquids at moderate to high concentrations (i.e., 0.05 to 0.5). In Objective no. 2, it was proposed to experimentally validate the theoretical predictions. We planned to design and construct an experimental test set-up and its supporting structures which will then allow us to flow suspensions in a channel over surfaces coated with and without a porous layer and to investigate the onset of instability. The set-up will be fully instrumented to measure the steady-state velocity and concentration profiles in the channel over the porous layer at low to moderate Reynolds numbers. We plan to perform the Osborne Reynolds experiment to define the onset of the instability in the system for dilute to concentrated suspensions. The slurry will be composed of poly(methylmethacrylate) (PMMA) particles with a mean radius of 100150 microns. Particle concentrations of 1% to 50% will be tested.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 15, 2022
- Accession Number
- AD1221372
Entities
People
- Parisa Mirbod
Organizations
- University of Illinois at Chicago