Influence of granulometric composition on flow of heterogeneous slurries
Identification | GA20-13142S |
Investigator | doc. Ing. Zdeněk Chára, CSc. |
Duration | 2020 - 2022 |
Pipe flow of heterogeneous solid-liquid mixture (slurry) produces considerably higher friction than flow of carrying liquid alone. The increase in friction is due primarily to contacts of transported solid particles with a pipe wall. In order to decrease the frictional energy loss during slurry transport, it is appropriate to minimize contact friction and an addition of finer solids fraction can be instrumental in reaching this goal. However, different finer fractions affect the coarse fraction friction in bimodal slurry flow through different mechanisms. The project investigates a suitable granulometric composition of bimodal slurries with an aim to minimize energy costs of the slurry transport. The research is based on an identification and description of mechanisms governing interaction of two fractions in the bimodal slurry flow. A special attention is paid to the proportion of grain sizes and volume concentrations of individual fractions as well as to an effect of flow conditions on an optimization of design and operation of pipelines transporting heterogeneous slurries. |