Nikuradse's velocity profiles for the core of turbulent pipe flow for high Re (Re>6000) are analysed by taking into account not only the dimensionless distance from the wal1 ti+) but also an equivalent radial position. An improved equation is introduced for the wal1 region, and both expressions lead
Correlations for the friction factor and velocity profile in the transition region for flow in sand-roughened pipes
โ Scribed by R.M. Nedderman; C.J. Shearer
- Publisher
- Elsevier Science
- Year
- 1964
- Tongue
- English
- Weight
- 180 KB
- Volume
- 19
- Category
- Article
- ISSN
- 0009-2509
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By using a specially designed probe mechanism which entered the system through the pipe outlet and which could be located quite accurately at any radial or longitudinal position in the pipe an extensive set of measurements was made of the temperature profiles in the heat-transfer entry section of an
Letters to the Editor According to our procedure, the functional relation, mixing condition and objective function are rewritten as x1.1 = fib,o; Wl) x1.0 = Q1Cl.f + Bx1.1; ct+p=1 x2.1 = x2.0 + -; (x1,1 -x1.0) -C(WI) xa,o = 0 For this case, equations (1) through (4) reduce to n z1.0 = Zl.1 afi(xl.0;