Selection of spiral capillary tube for refrigeration appliances and the effect of changes in the parameters such as capillary tube dimensions i.e. capillary tube diameter, coil pitch, capillary tube length and inlet conditions of refrigerant to the capillary tube i.e. degree of subcooling, inlet pressure on the mass flow rate of the refrigerant, also investigation about the coiling effect of sp...

Liquid flowing through a thin-walled "collapsible" tube similar to a vein, inclined to any angle between vertical and slightly above horizontal, differs from the flow in rigid tubes in that: a "collapsible" tube accepts any flow presented to it without affecting the rate of flow through the system; the lateral pressure at all cross sections throughout the tube is zero and does not change as the...

appropriate bronchus of each child during fiberscopic vision (Olympus LF-P, 2.2-mm OD, or LF-DP, 3.1-mm OD, passed through the inner tube; Olympus Optical Co., Ltd., Tokyo, Japan). Sufficient ventilation Tohoku University Postgraduate Medical School through the inner tube was obtained during the blocker positioning using a rubber-sealed Y connector (Bodai Swivel Y; Sotek Medical Inc., Hingham)....

The kaolin suspension calcination technology is currently gaining attention as a new process of calcining kaolin. In this paper, the cooling system designed by CBMI Construction Co., Ltd. simulated using ANSYS Fluent software to analyze velocity field and temperature gas–solid two-phase flow Eulerian model. A compiled UDF (User-Defined Function) used simulate transfer mass heat from downcomer t...

The principle of heat transfer enhancement in the core flow of a tube has been proposed, in this paper, to make fluid temperature uniform in the core region of a tube and decrease flow resistance, which is different from heat transfer enhancement in the boundary flow of a tube. Two new models, representing heat transfer enhancement in the laminar and turbulent tube flow, have been established a...

In this paper, the heat transfer enhancement in a counter-flow double pipe exchanger with longitudinal rectangular fins on outer surface of inner tube was numerically investigated by ANSYS 20.R1 software using CFD package and finite volume method. Hot water flows at 60℃ while cold 25℃. The flow is laminar five mass rates from 0.012kg/s to 0.02kg/s) for hot side 0.01kg/s 0.03kg/s side. Two types...

The porous media in tight reservoirs are mainly composed of micro- and nanopores, gas seepage through which is complex, making it difficult to study. Physical simulation using micron tubes an intuitive effective method study the mechanism gas. lattice Boltzmann (LBM) most for simulation, has been widely used. Microscale experiments LBM simulations with different inner diameters were performed. ...