چكيده به لاتين
In this study, the hydrodynamic behavior of two-phase liquid-liquid flow inside a T-shaped mini-channel with a diameter of 0.8 mm and horizontally and with a circular cross-section in two-dimensional and three-dimensional simulations in different regimes has been simulated. Materials used in this n-shop simulation as fuel and polyethylene glycol 200 (PEG-200) have been used as solvents. By determining the equations governing the phenomena of two-phase fluid flow transfer with computational fluid dynamics (Fluent software using volume of fluid technique) in the mini-channel and simulating its behavior in different conditions, the effect of operating factors and considering the mini-channel structure was studied. The flow regime and the size of the droplets measured in the laboratory have been used as a source for the accuracy of the results; In addition, the independence of the mesh has been done using different meshes. The effect of changes in inlet fluid velocity, fluid flow rate, mini-channel connection type and interfacial tension changes on droplet size and distance between two droplets and liquid film were investigated. The effect of changes in inlet fluid velocity, fluid flow rate, mini-channel connection type and interfacial tension changes on droplet size and distance between two droplets and liquid film were investigated. In capillary number less than 0.1188, the flow regime is in the form of a plug; and in this capillary number up to 0.298 the flow regime is jet; but at capillary numbers above 0.298 there is a flow regime between jet and parallel flow. At capillary numbers 0.596 and greater, the flow regime is parallel. At Reynolds number 0.0066 and interfacial tension 0.002 Newtons per meter, droplet length is 1.37 mm and distance between droplets is 0.907 mm. By increasing the surface tension in the constant Reynolds number to 0.005, the droplet length reaches 1.85 and the distance between the droplets reaches 1.81, while in the interfacial tension 0.009 these values reach 2.15 and 1.96.
