Numerical simulation of sanding using a coupled hydro-mechanical sand erosion model

Numerical prediction of erosion of Francis turbine in sediment laden flow

“…Regular inspection and maintenance practices allow for the timely detection and rectification of any runner wear issues, prolonging the lifespan of the mixed-flow turbine. Hydraulic turbine runner wear is influenced by various factors, including water quality, flow velocity, and material selection [4]. By implementing appropriate measures such as water pretreatment, flow control, suitable material selection, and regular maintenance, runner wear can be minimized, enhancing turbine performance and longevity.…”

A hydro-mechanical semi-analytical framework for hollow cylinder sanding tests

“…In general, sand production is investigated with models based on field or experimental observations often calibrated by field or laboratory data to prove their predictive efficiency. Research works on numerical, analytical and experimental investigations include: Qiu et al, 1 Osisanya, 2 Papamichos, 3 Rahmati et al, 4 Volonte et al, 5 Ikporo and Sylvester, 6 Wang and Sharma, 7 Gravanis et al, 8,9 Gholami et al, 10 Li et al, 11 Eshiet et al, 12 Fetrati and Pak, 13 van den Hoek et al, 14 Subbiah et al, 15 Sarris et al, 16 Ma et al, 17 Zhang et al 18 and Kakonitis et al 19 Many researchers have attempted to explain the cause of sand production. Sanding is attributed to the increase of effective Rate of softening (Eqs.…”

On the stress dependency of sand production coefficient in hydro-dynamical sanding criteria

“…Modelling-wise, the dependence of λ on the damage has been encoded by a plastic shear strain function. 3,5,9,13,21 The physical interpretation of modelling λ with a plastic shear strain function is that it captures the effect of the rock damage associated with the grain size and minerology of the material.…”