• Hærvig, Jakob
• Lehnigk, Ronald
• Sørensen, Kim
• Schlegel, Fabian
• Bilde, Kasper Gram

Abstract

Predicting the agglomeration and breakage of solid particles is important when designing a compact and efficient water purification process. A coupled computational fluid dynamics model is presented where the population balance equation is applied to track the particle size distribution for a periodic turbulent pipe flow with 180° bends for fluid Reynolds numbers of 15,000<Re f <35,000 and pipe bend radii of r B =d h ,r B =1.5d h and r B =2.5d h . The critical parameters in the Euler-Euler model are analysed and values are chosen to describe the agglomeration of soot particles based on an experimentally obtained particle size distribution measured using a Malvern Mastersizer 3000. It is concluded that the particle Sauter mean diameter converges to a constant value independent of the pipe bend radius when Re f >30,000. The Sauter mean diameter increases from d 32 =42.7μm to d 32 =95μm without changing the total length of the static flocculator by choosing r B =d h and Re f =15,000.

Topics

• impedance spectroscopy