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December 27, 2019, 06:06 |
Critical Reynolds Number
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#1 |
New Member
Mikel
Join Date: Dec 2019
Posts: 16
Rep Power: 6 |
Hi,
I'm trying to get the critical Reynolds number to know when it goes from laminar flow to turbulent flow. To reach this, I am simulating with the following characteristics: - Transient flow - Laminar flow - Flow over a 2D cylinder - Diameter: 48mm - Density: 1,225 kg / m3 - Viscosity: 0.001852kg / s m My doubt lies that when I simulate low Reynolds numbers, it is clear that it is a laminar flow com can be seen in the following photo: -Re = 75 FFF.png But as I increase the Reynolds number, increase the speed, an intermediate flow begins to be created but I don't know at what specific point it is a turbulent flow, and thus get the critical Reynolds number. In the following photos you can see different numbers of Reynolds: -Re =85 FFF1.png -Re =100 FFF3.png -Re =127 FFF4.png -Re =159 FFF5.png Therefore, what I want to know is if there is any tip that I can rely on to know when a flow is laminar or turbulent. |
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