Definition - What does Flow Structure mean?
Flow structure is the geometrical distribution of a fluid flowing through a pipe. The term might be similar to flow regime but used to detail larger features than flow regime. For instance, in a deviated well, the flow of gas and oil stays only in uppermost part of the pipe while water stays in the lower section. The structure development depends on various factors such as oil viscosity, diameter ratio, flow viscosity, and water loading ratio.
Petropedia explains Flow Structure
Flow Structure has liner and planer features produced from the flow of magma, with or without crystals. It defines layering that reflects textural and compositional homogeneities. Often, the structures are highlighted by preferred orientation of crystals, spherulites, and vesicles. According to surveys which have been conducted, Flow Structure development can be done by injecting water to the annulus of heavy oil pump flow. Moreover, the major changes in the structure occur only at the water-oil surface. Multi-phase flowmeters are used to measure the transit velocity of the Flow Structure. The Flow Structure develops at a much faster rate with the increase in oil viscosity.