If we have an air flow in a tube that had d=0.5m however the diameter of the air flow on the inlet side is only 0.2m with a velocity of 0.13m/s. By simulating it through fluent we observe the occurrence of two regions one laminaire and the other is turbulent. The problem is that this observation is against what Reynolds states since for such a velocity and diameter we tend to have Re=1800 witch means just laminar region can u explain why did the turbulence occurred?

does anyone know or what?

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

answercollision;