MEASUREMENTS OF SKIN FRICTION FOR TURBULENT MAGNETOFLUIDMECHANIC CHANNEL FLOW

Technical Report · Wed Aug 01 04:00:00 EDT 1962

OSTI ID:4748450

Brouillette, E C; Lykoudis, P S

Experiments were conducted in a range of fully developed turbulent flows of mercury in a rectangular duct in the presence of a transverse magnetic field. Friction coefficients expressing the effect of the magnetic field on the flow were derived, covering the Reynolds number range from 7.7 x 10/sup 4/ to 4.0 x 10/ sup 5/ and the Hartmann number range from 0 to 73. Previously reported results up to a Reynolds number of 1.2 x 10/sup 5/ agree with the present values. At higher Reynolds numbers, the present data show a strong monotomic increase of the skin friction coefficient for a given Reynolds number and increasing magnetic fields in variance with the minimum C/sub f/'' observed at lower Reynolds numbers. The present data, therefore, invalidate theoretical predictions based on such a minimum. (auth)

• Research Organization: Purdue Univ., Lafayette, Ind. School of Aeronautical and Engineering Sciences
• NSA Number: NSA-17-016229
• OSTI ID: 4748450
• Report Number(s): NP-12631; A&ES-62-10
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

EFFICIENCY
ENGINEERING AND EQUIPMENT
FRICTION
LIQUID FLOW
LIQUID METALS
MAGNETIC FIELDS
MAGNETOHYDRODYNAMICS
MERCURY
PIPES
REYNOLDS NUMBER
SURFACES
TURBULENCE