Non Linear Laminar Flow Characterization for Different Fabric Pore Shapes

The hydrodynamic behavior of a plane fabric filter was investigated. The emphasis was put on the influence of cloth weave onto flow structure downstream from the filtering media. Experiments were performed on a 50:1 scaled-up glass model of a 3-ply twill textile sample used in water treatment applications. Air was used as working fluid. The Reynolds similarity criterion was applied to design the experimental facility used throughout this work. This entailed a mean flow velocity of 0.07 m/s. Particle Image Velocimetry (PIV) was used to observe and analyze the flow structure past inter-yarn pore models of various shape. Comparisons of mean velocity profiles upstream and downstream from the model were made to determine the distance over which wake effects remain noticeable case depending.