scholarly journals An improved triangular form-based multiple flow direction algorithm for determining the nonuniform flow domain over grid networks

2021 ◽  
Pengfei Wu ◽  
Jintao Liu ◽  
Xiaole Han ◽  
Meiyan Feng ◽  
Junyuan Fei
2021 ◽  
pp. 107224
Hojat Karami ◽  
Mahdi Valikhan Anaraki ◽  
Saeed Farzin ◽  
Seyedali mirjalili

1979 ◽  
Vol 101 (4) ◽  
pp. 655-661 ◽  
P. M. Gerhart ◽  
S. P. Nuspl ◽  
C. O. Wood ◽  
S. W. Lovejoy

An investigation into the suitability of several types of velocity probes in current use for measurement of nonuniform flow in large ducts is described. An experimental duct was fabricated with a test section near the discharge of a centrifugal fan. Different flow rates were obtained by using an adjustable throttle plate at the duct outlet. The flow rate in the duct was also measured at a downstream section located nine diameters from the fan. A flow straightener was located between the fan and this measuring station; the flow rate measured at this section was assumed to be the true flow rate in the duct. Six different velocity probes of five different designs were used to measure the flow at the fan discharge. The probes were 1) Pitot-static tube, 2) Kiel (Pitot-venturi) tube, 3) Forward-reverse tube (2 tubes), 4) Fechheimer (three hole yaw probe), and 5) turbine meter probe. Of these, only the Fechheimer is capable of measuring the direction of the flow. The best results were produced by the Fechheimer probe. This is felt to be due to this probe’s ability to measure direction as well as speed. It is recommended that only probes which are capable of sensing flow direction be used in highly nonuniform flows.

Adam Pike ◽  
Tom Mueller ◽  
Eduardo Rienzi ◽  
Surendran Neelakantan ◽  
Blazan Mijatovic ◽  

2011 ◽  
Vol 2 (1) ◽  
pp. 13-17
I. David ◽  
M. Visescu

Abstract Geothermal energy source is the heat from the Earth, which ranges from the shallow ground (the upper 100 m of the Earth) to the hot water and hot rock which is a few thousand meters beneath the Earth's surface. In both cases the so-called open systems for geothermal energy resource exploitation consist of a groundwater production well to supply heat energy and an injection well to return the cooled water, from the heat pump after the thermal energy transfer, in the underground. In the paper an analytical method for a rapid estimation of the ground water flow direction effect on the coupled production well and injection well system will be proposed. The method will be illustrated with solutions and images for representative flow directions respect to the axis of the production/injection well system.

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