Experimental investigation of fluid flow in horizontal pipes system of various cross-section geometries

Abstract

Abstract. The current research work presents experiments of an essentially incompressible fluid flow in pipes. The experimental equipment consists of a horizontal pipe including a gate valve, a Venturi meter, a wide angle diffuser, an orifice plate, a 90-degree elbow and pressure tappings. An elbow connects the pipe to a rotameter with further pressure tappings. All pressure tappings connected to manometers held on a vertical panel behind the pipe work and show pressure at various points. The effect of the pipe geometry in the flow pattern is presented. Furthermore head losses are estimated, at specific stream-wise cross-sections, for mass flow rate numbered from 0.056 to 0.411 l/s. The manometers measure and clearly show pressure distribution against a calibrated scale. The diagrams of mass flow rate and head losses are presented in specific crosssections, where geometry changes. All measurements were calibrated and validated in a maximum standard deviation difference of 5%. The head losses decrease as the mass flow rate decreases, for all pipe geometries. In the future the experimental results can be used to verify numerical simulation results.

Dynamic behavior of fluid flow through a downscaled model of Bissokotuwa of the ancient reservoirs in Sri Lanka

“…This implies that the deceleration of water entering and the energy dissipation inside the Bissokotuwa chamber is governed by those shear forces (Peiris and Wijesinghe, 2008). Total head is a measure of the potential of an incompressible fluid at the measurement point which can be used to determine a hydraulic gradient between two or more points (Farsirotou et al, 2014). This concept of head relates the energy in an incompressible fluid to the height of an equivalent static column of the fluid (Farsirotou et al, 2014).…”

“…Total head is a measure of the potential of an incompressible fluid at the measurement point which can be used to determine a hydraulic gradient between two or more points (Farsirotou et al, 2014). This concept of head relates the energy in an incompressible fluid to the height of an equivalent static column of the fluid (Farsirotou et al, 2014). Units are in different forms of energy in Bernoulli's Equation and can be measured also in units of distance.…”

“…Then, the total head is given as the sum of the pressure head, elevation head (z), and velocity head as shown in Equation ( 4) (Farsirotou et al, 2014). The total head can be written in terms of static pressure (P), flow velocity(ν), and acceleration due to gravity (g) shown in Equation ( 5) (Farsirotou et al, 2014).…”

Functional and Metrological Issues in Arterial Simulators for Biomedical Testing Applications: A Review

“…In the current state-of-the-art research, the main works regarding experimental set-ups for arterial simulation investigated blood flow behavior in artery bifurcations [23][24][25][26][27][28], or in the presence of stenosis and plaques [29][30][31][32][33][34][35][36][37]. Other authors designed and developed arterial simulators with the goal of experimentally validating the mathematical models behind the relationships subsisting between flow and pressure, or between flow and geometrical and mechanical characteristics of the artery [38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54]. Another important and prolific field of application for arterial simulators is medical device testing, especially in the context of artificial organs, such as ventricular assist devices (mono-or biventricular) and artificial hearts (through centrifugal blood pumps).…”

Comparative design and CFD analysis of 3-D printed acrylonitrile butadiene styrene nozzle aerator for discharge reduction

“…If the drive ratio of the flow pathlines increased, the nonlinear effect and the discrepancies have observed. Farsirotou et al [6] have discussed that the minor losses incorporated in the incompressible fluid flow pipelines because of various pipe fittings and accessories. It has observed from the experimental values that the higher mass flow rate have been created more minor head losses due to cross-sectional changes.…”