Herschel–Bulkley fluid

About: Herschel–Bulkley fluid is a research topic. Over the lifetime, 1946 publications have been published within this topic receiving 49318 citations.

Investigation of numerical simulation of non-Newtonian flows dam break and dam breach in open channels using modified VOF method

Abstract: This paper concerns modelling dam break flows of non-Newtonian Herschel-Bulkley (HB) fluid by using the volume of fluid (VOF) method and high resolution advection schemes. The VOF method is based on the fact that two or more fluids (or phases) are not interpenetrating. In the present study, a modified approach is used to overcome this problem. The OpenFoam software is employed and inter-Foam solver is used in two and three-dimensional model with non-Newtonian fluid. The numerical results of the present study are compared with analytical, numerical and experimental results found in literature. The numerical code which is used showed better agreement with the experimental data than those using shallow water equations and PLIC method.

Spreading Kinetics of Herschel-Bulkley Fluids over Solid Substrates

Abstract: The spreading kinetics of Herschel-Bulkley fluids on horizontal solid substrates was studied theoretically. The evolution equations of film thickness were established in both gravitational and capillary regimes and the dynamic contact angles were derived. Finally, the results were compared with known references. The results show that the yield behavior of the fluids is considered to have a significant impact on the spreading kinetics in both cases. Only when stress is larger than yield stress, the significant flow will occur above the substrate. Spreading zone will be divided into two parts by yield surface: sheared zone and yield zone, which is different from the common Newtonian fluids or power-law non-Newtonian fluids extremely. Below the yield surface (z

Numerical simulation of non-Newtonian fluid flow in a stirred tank

Abstract: Numerical simulation of non Newtonian turbulent flow in a stirred tank is still on an early age and further development is needed In this paper, the flow field of a shear thinning fluid carboxymethylcellulose(CMC) was simulated using standard k e model The results predicted a distinct difference in velocity distribution between a shear thinning fluid and a simple Newtonian fluid(water) The main circulation loop was decreased and a swirl flow was formed at the tip of the impeller The predicted non Newtonian fluid velocity agreed well with velocity measured by Particle Image Velocimetry(PIV) The simulated shear rate distribution is different in the whole tank and its value near the impeller and tank wall is high