The Experts below are selected from a list of 48 Experts worldwide ranked by ideXlab platform

I. V. Laptev - One of the best experts on this subject based on the ideXlab platform.

Enrico Sciubba - One of the best experts on this subject based on the ideXlab platform.

  • Entropy Generation Minima in Different Configurations of the Branching of a Fluid-Carrying Pipe in Laminar Isothermal Flow
    Entropy, 2010
    Co-Authors: Enrico Sciubba
    Abstract:

    Abstract: The paper discusses a simple multi-variable optimization problem: the bifurcation of a branch of a Pipe of circular cross-section with a given initial radius 0 and rdelivering a given mass flow rate 0 .The optimization is performed using an objective mfunction that prescribes the minimization of the entropy generation rate due — in this simple case only to viscous flow effects within the tubes. Several fundamental — simplifying assumptions are made to reduce the problem to a multivariable optimization in -three independent variables: the aspect ratio of the domain served by the flow, the diameter ratio of the primary and secondary branches, and the length of the secondary branch (the location of both the “source” of the fluid and the “sink”, i.e. , the place of desired delivery of the fluid, being a datum).It is shown that the solution is strongly dependent both on the aspect ratio and on the diameter ratio, and that the "optimal" configurations display some resemblance to the branching patterns observed in natural structures. The study poses a challenge both to Designers and to Natural Scientists: are the optima suggested by the present procedure compatible with the structures currently used in heat exchangers and flow devices? Are they compatible with the structures observed in nature? No final answer is provided in this preliminary study, but a possible "falsification" procedure is outlined in the conclusions.

Alan S. Morris - One of the best experts on this subject based on the ideXlab platform.

  • 16 – Flow measurement
    Measurement and Instrumentation Principles, 2001
    Co-Authors: Alan S. Morris
    Abstract:

    Publisher Summary This chapter discusses the rate at which fluid flows through a closed Pipe and how it can be quantified by either measuring the mass flow rate or measuring the volume flow rate. The method used to measure mass flow rate is largely determined by whether the measured quantity is in a solid, liquid, or gaseous state. Conveyor-based methods are concerned with the measurement of the flow of solids that are in the form of small particles. The Coriolis flowmeter is primarily used to measure the mass flow rate of liquids, although it has been successfully used in some gas-flow measurement applications. Thermal mass flowmeters are primarily used to measure the flow rate of gases. The principle of operation is to direct the flowing material past a heated element. Volume flow rate is an appropriate way of quantifying the flow of all materials that are in a gaseous, liquid, or semi-liquid slurry form, where solid particles are suspended in a liquid host, although measurement accuracy is inferior to mass flow measurement. The gate meter consists of a spring-loaded, hinged flap mounted at right angles to the direction of fluid flow in the fluid-Carrying Pipe. All the usual benefits associated with intelligent instruments are applicable to most types of flowmeter. Indeed, all types of mass flowmeter routinely have intelligence as an integral part of the instrument. The number of relevant factors to be considered when specifying a flowmeter for a particular application is very large.

O. V. Mashytun - One of the best experts on this subject based on the ideXlab platform.

  • IMPROVING THE RELIABILITY OF UNDERGROUND METAL AND CONCRETE PipeS
    Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport, 2005
    Co-Authors: Yu. V. Beliavskyi, O. V. Mashytun
    Abstract:

    The analysis of work of the system «high filling – water-Carrying Pipe – the base» reveals the causes of stretch deformation alone the Pipe axis, deflection of the Pipe body in relation to its heads, etc. For solution of these problems new designs of water-Carrying Pipes have been suggested.

S. G. Cherkasov - One of the best experts on this subject based on the ideXlab platform.