THE EFFECTS OF SUPERIMPOSED FORCED AND FREE CONVECTION ON HEAT TRANSFER IN A VERTICAL RECTANGULAR DUCT

Journal Article · Wed Dec 31 23:00:00 EST 1958 · Chem. Eng. Progr.

OSTI ID:4175470

Altman, M; Staub, F W

Average and local experimental heat transfer coefficients are reported for a vertical duct of rectangular cross section where the mean air flow is from the top to the bottom of the duct and where heat is being added to the air at the walls. Results are given for a Reynolds number range of 1,800 to 10,000 based on the equivalent duct diameter for a duct length to equivalent diameter ratio of 69. The characteristic "dip region" in the transition zone between turbulent and laminar flow conditions is absent for Grashof numbers greater than 2 x 10/sup 5/ based on diameter. (auth)

• Research Organization: General Electric Co., Schenectady, N.Y.
• NSA Number: NSA-14-012690
• OSTI ID: 4175470
• Journal Information: Chem. Eng. Progr., Journal Name: Chem. Eng. Progr. Vol. Vol: 55, Symposium Ser. No. 29
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

AIR
CONFIGURATION
CONVECTION
ENGINEERING AND EQUIPMENT
FLUID FLOW
FORCED CONVECTION
FREE CONVECTION
GAS FLOW
GRASHOF NUMBER
HEAT TRANSFER
HEATING
PIPES
REYNOLDS NUMBER
TEMPERATURE
TRANSITION TEMPERATURE
TURBULENCE