TY - JOUR
T1 - Modeling two phase dense flow containing cohesive sediments in water environment using SPH method
TT - مدلسازی دوفازی جریان چگال حاوی رسوبات چسبنده در محیط آبی به روش هیدرودینامیک ذرات هموار
JF - mdrsjrns
JO - mdrsjrns
VL - 20
IS - 5
UR - http://mme.modares.ac.ir/article-15-35299-en.html
Y1 - 2020
SP - 1245
EP - 1254
KW - two phase SPH model
KW - dense flow
KW - non-Newtonian phase of cohesive sediments
KW - Herschel-Bulkley-Papanastasiou model
KW - advection-diffusion equation
N2 - Investigating dense flows containing cohesive sediments (turbidity currents) in water environment has been a main interest for researchers in hydraulic and fluid mechanic science. This kind of flow streams at bed surface because of higher density than water and penetrate to overhead water, which causes turbidness. In the following research, this kind of flow has been modeled using two-phase simulation with smoothed particle hydrodynamics Lagrangian method. A SPHysics2D code has been developed for modeling, in which pressure value is explicitly calculated using equation of state. Also, Herschel-Bulkley-Papanastasiou single relation non-Newtonian viscoplastic model has been used for modeling cohesive sediment phase. After that for investigating the amount of penetration of cohesive sediment mixture in limpid water, advection-diffusion equation was used for developing code. Finally, one and two phase results obtained from the present model were compared to experimental models. The study shows that the present developed model is able to model these flows desirably and could be utilized for studying concentration amount, dense flow penetration and their propagation in water environment.
M3
ER -