pisco_log
banner

Mathematical Modeling of Hydraulic Resistance in Pipes With Rough Walls

Lobanov Lgor Evgenjevich

Abstract


In recent years, the numbers of patents have been devoted to the development of rough pipes. The technique theoretical settlement determine of factor of hydraulic resistance for round pipes with rough walls is developed on the basis of a principle of a superposition of complete viscosity in turbulent a layer mainly distinguished from the existing theories. The received results of account for the extended range of determining parameters much distinguished from appropriate given for round pipes with turbulizers, specify a level и intensification of heat exchange.

Keywords


roughness; hydro-resistance; modeling; turbulent; intensification; heat transfer.

Full Text:

PDF

Included Database


References


Kalinin E.К., Dreytzer G.А., Kopp I.Z., et al. Effective surfaces of heat exchange. Energoatomizdat, Moscow, 1998; pp.408.

Lobanov I.Е.. Heat transfer in turbulent flow in a plane channel with evenly spaced sur-face unilateral-lateral tur- bulence flow. Bulletin of mechanical engineering 2012; 8: 13-17.

Lobanov I.E.. Mathematical modeling of intensified-tion heat transfer in turbulent flow in pipes with turbulization-congestion based on the equation of balance of turbulent fluctuating energy of. Sectoral aspects of Engineering 2012; 12 (24-34).

Lobanov I.E. Modeling the Structure of Vortex Zones between Periodic Superficially Located Energizers of the Flow of a Rectangular Cross Section. Mathematical Models and Computer Simulations 2013; 5 (1): 63-74.

Ievlev V.М. Numerical modeling turbulent of currents. Science 1990; 215.

Ljahov V.К. Method of relative conformity at accounts turbulent parietal of flows. Publishing house of the Saratov university 1975; 123.

Ljahov V.К., Мigalin V.К. Effect thermal, or diffusive, roughness. Publishing house of the Saratov university 1989; 176.

Ismagilovich, R.S., Janovich, G.A.G., Mukhutdinovich, G.M., Nikolaevich, M.V., Grigor'evich, K.V. Method of reducing hydraulic resistance in turbulent flow.RU2288402 (2006).

Rajnarayan, Dev., Sturdza, P. Predicting transition from laminar to turbulent flow over a surface. US8538738 (2013).

Rajnarayan, Dev., Sturdza, P. Predicting transition from laminar to turbulent flow over a surface using mode-shape parameters. US20130282629 (2013).

Liu, L. Anti-drag heat insulation method for oil and gas pipeline. CN101922595 (2012).

Мilliontshikov М.D. Turbulent of current in a boundary layer and in pipes. Science 1969; 52.

Мilliontshikov М.D. Turbulent of current in a boundary layer and in pipes Nuclear energy. 1970; 28(3): 207-214.

Мilliontshikov М.D. Turbulent is warm- and mass exchange in pipes with smooth and rough walls. Nuclear energy 1971; 31 (3): 199-204.

Complexity in Biological and Physical Systems - Bifurcations, Solitons and Fractals. Intech Open; 2018. p. 14-20




DOI: https://doi.org/10.18282/mpc.v1i1.566

Refbacks

  • There are currently no refbacks.