The flow condition of a fluid system when one of the fundamental nondimensional parameters has a critical value, for example, flow of water in an open channel at a Froude number of 1, flow of gas at a Mach number of 1, flow in a pipe at Reynolds number greater than 2100, or shear flow in the atmosphere at Richardson number less than 0.25.
Where did the Vikings come from? The Vikings came from the countries which we know now as Denmark, Norway and Sweden. We refer to the area that these countries are located as Scandinavia. The Vikings lived mainly along the coastlines of these countries or along the rivers which ran into the seas.These are the Vikings that left their lands to explore, invade and settle in other lands, Some Vikings did live further inland but, like most settlements and villages, they were often located near to rivers.he Vikings lived mainly along the coastlines of these countries or along the rivers which ran into the seas. These are the Vikings that left their lands to explore, invade and settle in other lands, Some Vikings did live further inland but, like most settlements and villages, they were often located near to rivers.
One etymology derives viking vÃ­king from the feminine, vik vÃ­k, meaning, creek inlet. Small bay various theories have been offered that the word viking may be derived from the name of The historical norwegian District (of Viken or Vikin VÃ­kin), in old norse meaning A . person from vikenaids in Europe, including raids and settlements from Scandinavia, were not something new and also seen long before the Vikings came. The Jutes invaded the British Isles three centuries earlier, pouring out from Jutland during the Age of Migrations, before the Danes settled there.