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Today's featured article Multiphase flow Much has been written in the literature regarding the multiphase flow of fluids in pipe. This problem is much more complex than the single-phase flow problem because there is the simultaneous flow of both liquid (oil or condensate and water) and vapor (gas). The mechanical energy equation (Eq. 3) is the basis for methods to estimate the pressure drop under multiphase flow; however, the problem is in determining the appropriate velocity, friction factor, and density to be used for the multiphase mixture in the calculation. In addition, the problem is further complicated as the velocities, fluid properties, and the fraction of vapor to liquid change as the fluid flows to the surface due to pressure changes. Read more.... Top pages viewed PetroWiki‏‎ (2,267,637 views) Pipeline design consideration and standards‏‎ (70,979 views) Casing and tubing‏‎ (50,858 views) Packers‏‎ (49,113 views) Drilling fluid types‏‎ (36,894 views) Oil viscosity‏‎ (36,824 views) Reciprocating compressor‏‎ (34,334 views) Oil and gas separators‏‎ (32,676 views) Strength of casing and tubing‏‎ (26,164 views) Centrifugal compressor‏‎ (25,380 views)

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