Dynamic Gauging of Soft Fouling Layers on Solid and Porous Surfaces

Abstract

Dynamic Gauging of Soft Fouling Layers on Solid and Porous SurfacesThe experimental determination of characteristic parameters of soft coatings such as biofilms and protein deposits is essential for the study of biotechnological and chemical engineering problems. The technique of fluid dynamic gauging allows the thickness and strength of soft fouling layers to be measured in situ and in real-time under different flow conditions. It is possible to monitor the thickness and strength of biofilms and protein deposits. Different operating modes and nozzle designs allow deposit specific investigations. This paper reports some recent developments of the technique.

Aseptic Zero Discharge Fluid Dynamic Gauging for Measuring the Thickness of Soft Layers on Surfaces

“…The technique has been used to study the growth (fouling) and removal (cleaning) of a range of layer materials, and a scanning version of the device allowed different regions of a layer or substrate to be investigated (Gordon et al [5]). A comprehensive description of the application spectrum is given in Augustin et al [6].…”

“…Dashed line -CFD simulation, ejection: solid line -CFD simulation, suction (both for deionised water). Inserts show Cd vs h0/dt in the usefully linear region 499x793mm (72 x 72 DPI)Effect of throat Reynolds number on Cd for deionised water (squares), % sucrose solution (triangles) and 10 % sucrose solution (circles) in (i) ejection (open symbols) and (ii) suction (solid symbols) at (a) h0/dt = 1.0, (b) h0/dt = 0.14, (c) h0/dt = 0.12 and (d) h0/dt = 0.10 696x431mm (72 x 72 DPI)Comparison of experimental measurements, CFD simulations and Equations[6] and [10] for (a) h0/dt = 0.14 and (b) 0.10. Symbols, data: solid -this work, open -Tuladhar et al[1].…”

“…Symbols, data: solid -this work, open -Tuladhar et al[1]. Dashed line, Equation[6], solid lines, Equation [10], dotted lines -CFD simulation (deionized water). Gauging liquid: squaresdeionised water, triangles -8 % sucrose solution, circles -10 % sucrose solution 459x552mm (72 x 72 DPI)…”