CFD simulation of estimating critical shear stress for cleaning flat soiled surface

Soiled adhesive pads shear clean by slipping: a robust self-cleaning mechanism in climbing beetles.

Animals using adhesive pads to climb smooth surfaces face the problem of keeping their pads clean and functional. Here, a self-cleaning mechanism is proposed whereby soiled feet would slip on the surface due to a lack of adhesion but shed particles in return. Our study offers an in situ quantification of self-cleaning performance in fibrillar adhesives, using the dock beetle as a model organism...

CFD for Predicting Shear Stress in a Curved Trapezoidal Channel

Abstract Continuing advances in computer speed and the availability of user friendly software has made computational fluid dynamics a cost effective compliment and at times alternative to physical modeling in the field of civil engineering hydraulics. Validation of the CFD models for open channel flow conditions remains limited due to the significant cost of obtaining data. Furthermore, once th...

Effect of soil composition on critical water erosion shear stress

Methods for Estimating the Critical Shear Stress of Individual Fractions in MixedSize Sediment

Two methods are commonly used to estimate the critical shear stress of individual fractions in mixed-size sediment, one using the largest grain displaced, the other using the shear stress that produces a small value of transport rate for each fraction. The initial-motion results produced by the two methods are typically different: largest-grain critical shear stresses vary with roughly the squa...

A method for measuring the critical shear stress of cohesive soils