2. Theoretical overview
2.1 Incompressible fluids
A fluid is considered incompressible if its density does not vary significantly under the effect of the negative pressure used to measure its flow velocity. Since this article is primarily concerned with the engineering and practice of flow measurement using depressurizers, we will limit the theoretical developments to those which can be consulted in the basic literature. A brief summary can, however, be given based on the energy conservation equation established in 1738 by Daniel Bernouilli for an incompressible fluid:
The Ultimate Scientific and Technical Reference
This article is included in
Physical measurements
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
Theoretical overview
The different types of depressants
Installation
Insert the CD ROM into the drive and double-click on "My Computer".
Double-click on the "Setup" icon.
The installation program generates a Program Files \TI\DepWin directory, but you can choose to create a different directory; an icon is also created, and placed on the "Desktop". If this is not the case, you can create a shortcut from Windows Explorer. Don't forget (if you...
Controls
Program commands can be accessed either from a menu bar or from a toolbar below. The list of commands and how to access them is :
The wording of the toolbar icons is that of the hint message that appears when the cursor is brought close to the corresponding icon.
1. File/New menu or "Reset" icon: variables on screen are completely erased. Use to perform a new calculation without...
Program description
Program
The program includes the following functional elements:
-
a user interface module, which enables
data entry ;
various controls: see § 2
A practical note on checking integrated orifices
This note is intended for users who attempt to verify built-in orifices using the present program.
Integrated orifices are devices whose diameters are generally below the minimum limits set by ISO for pipe and primary element diameters, and which may deviate from the standard in many other respects: it is therefore by no means certain that their coefficients are...
Printing data
The DEPWIN program can print out the results displayed on the screen. To do this, simply activate the "Print" command (§ 2). A second screen appears, showing the results as they will be printed.
At the top of this screen is a toolbar:
the first three buttons from the left are zooms, allowing you to select the data display. They have no further effect...
The Ultimate Scientific and Technical Reference
