Refugees and asylum seekers in Lebanon make up about 10 percent of the country's total population. Palestinians make up the majority of refugees, followed by Kurds, Iraqis, and Sudanese (see Table 1).
The resistance of gas or liquid to flow? The resistance of a liquid to flowing is its viscosity.   Viscosity is a property arising from friction between  neighboring particles in a fluid that are moving at difâ¦ferent  velocities. In liquids, it could be considered the thickness.
then smooth boundary >100.Roughness in the term of reynolds number Instead of value of is used to classify the type of boundary and limits for these type of flow is <4. then rough boundary . Laminar Flow in a Pipe The behavior of flow in pipes is determined by the Reynolds number Re. .Criterion for Turbulent vs. Flow tends to become turbulent when Re > 3000. the behavior is unpredictable and often switches back and forth between laminar and turbulent.