Reynolds number for turbulence in liquids and gases
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Experts, is the Reynolds number for turbulence the same when the medium is a liquid or a gas, and what is the threshold value? I saw some say 1500, while others state that the range of 2300–4000 is the transitional zone; values above 4000 indicate turbulence, and values below 2300 indicate laminar flow. What’s going on?:'
According to textbooks on chemical engineering principles, a Reynolds number of 2000 or less indicates laminar flow, while a value of 4000 or more indicates turbulent flow. Values between these two ranges can be either laminar or turbulent, depending on external conditions; changes in pipe diameter or direction, as well as minor external vibrations, can all lead to turbulent flow. This is why such a range is also referred to as the transition zone. In practical operations, values above 3000 are generally considered turbulent flow. The Reynolds number here refers to the fluid; there shouldn’t be much difference between gases and liquids