Impacto da presença de particulado no escoamento em válvulas Tesla

Abstract

The influence of particulate matter on the flow on Tesla valves was investigated. The current literature cites the insensibility of this device to particulate matter, however, literature corroborating that assertion was not found even though it was a parameter for choosing such valve. Two dimensional numeric simulations were made using a Tesla valve model already studied by the literature. The effects of the number of elements in the mesh, utilization of 𝑘 𝜔 SST turbulence model and Reynolds numbers 100, 200 and 400 with steady state flow regime. Transient state, 𝑘 𝜔 SST turbulence model, and the same Reynolds numbers were used in simulations with volumetric percentage of particulate matter between 0 and approximately 10% were used to evaluate the influence of the particulate matter. It was observed a positive effect on diodicity, an important parameter for the evaluation of the performance of passive valves as found on the literature, that, in general, grew with the growth of the particulate matter volumetric percentage. The particulate matter shows itself as a possible new variable for the optimization and choosing of Tesla Valves. New Studies are necessary to evaluate the influence of the individualized characteristics of the particulate matter such as: density, size, and shape.