those who are far from physics, devoted.Start the text otherwise I can not, because the number of Reynolds personally I did not cause any response in the part of knowledge, where information must be stored in physics.Let's try to fill this gap.
To warm up more precise, Osborne Reynolds who was at one time in their field.This scientist was the representative of the English (some sources - Irish) scientific community in the field of physics, engineering and hydraulics.Born in 1842, after 28 years, he became a professor at the department of structural mechanics at Cambridge.His research led to the behavior of liquids in laminar (layered) and turbulent (vortex) flow.That he belongs to the allocation of a numerical criterion of transition from one type of course to another.This quantity is known to us as the Reynolds number.
What is the meaning of?This parameter is not constant and a certain balance of forces of inertia and internal friction in the liquid stream.As the notation of this criterion apply Re.As for the unit, then they do not exist, as the Reynolds number for water, gas and any other environment is a dimensionless quantity (number as such).
Certain One deserves respect persistence English scientist, who had to spend more than one hundred tests to identify a similar ratio.He was able to identify the following pattern: at high rates (more than 2 - 3 million), the water flow is fully turbulent, and for small - is completely laminar.
Many include the results of such calculation to the indications that have been obtained only by experience, and when you change or endless repetition can "fall out" of the current framework.However, many interpret them quite well from the standpoint of Newton's laws.In simple terms, the fluid in the flow has a certain inertia and tend to keep their movement with the same speed.
significance of this criterion, according to data from various sources can not be overstated.It is this value and principle of its production tell us that the impact of the environment (water, gas or other substance) is not so much dependent on the speed, inertia or friction, how much of their interaction.It is this interaction and is reflected in the ratio, which is called the "Reynolds number".For water, the movement which takes place through the narrow channels (or pipes), "borderline" conversion rate is the quantity exceeds the figure of 12,000 - 20,000 An increase resistance of the medium will increase.Water in the open space of air and pattern will be reversed: increasing the Reynolds number will reduce the resistance.
its application, this criterion was not only in fluid mechanics, but also in aviation and shipbuilding.For example, it is the Reynolds number allows reliable testing of new aircraft models, completely mimics the actions of the real air flow in the reduced model.
P.S.The calculation formula itself does not bring to the intent, if the reader interested in this topic, learn the procedure for calculating the value of this is not difficult.
