Heat transfer and friction in entry region through a square duct in turbulent flow

• Autorzy: Khan R. , Ali M. , Akhanda M.
• Języki publikacji: EN

Abstrakty

EN

This paper presents experimental results concerning the flow characteristics obtained in forced convection heat transfer for a turbulent flow in developing region through a smooth square duct. The duct is heated by passing alternating current. Velocity and temperature distributions across different cross-sections of the test duct are examined. The result shows that heat transfer coefficient increases by 8.73 % as Reynolds number increases up to 13.04 %. The velocity distribution attains the maximum value near the midway between the wall bisector and the adjacent wall. An empirical correlation has been developed and the result has been compared with other correlations available in the literature.

Słowa kluczowe

EN

forced convection; heat transfer; square duct

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN ; Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archives of Thermodynamics
• Rocznik: 2003
• Tom: Vol. 24, no 3
• Strony: 3--15
• Opis fizyczny: Bibliogr. 11 poz.,

Twórcy

autor

Khan R.

• Bangladesh University of Engineering and Technology, Dhaka, Bangladesz

autor

Ali M.

• Bangladesh University of Engineering and Technology, Dhaka, Bangladesz

autor

Akhanda M.

• Bangladesh University of Engineering and Technology, Dhaka, Bangladesz

Bibliografia

• [1] JAMES D. D.: Forced convection heat transfer in ducts of non-circular section, Ph.D Thesis, Imperial College, Uni. of London, U.K, 1967.
• [2] HONG S. W. AND BERGLES A. E.: Laminar flow heat transfer in the entrance region of semi-circular tubes with uniform heat flux, Int. J. of Heat and Mass Transfer, Vol. 19(1976), 123-124.
• [3] MONOHAR R.: Analysis of laminar flow heat transfer in the entrance region of circular tubes, Int. J. of Heat and Mass Transfer, Vol. 12(1969), 15-22.
• [4] Ulrichson D. L. and Schmitz R. A.: Laminar flow heat transfer in the entrance region of circular tubes, Int. J. of Heat and Mass Transfer, Vol. 8(1965), 253-258.
• [5] HWANG C. L. AND FAN L. T.: Finite difference analysis of forced convection heat transfer in entrance region of a flat rectangular duct, Appl. Sci. Res., Sec. A, Vol. 13(1964), 401-422.
• [6] SPARROW E. M.: Analysis of laminar forced convection heat transfer in entrance region of flat rectangular ducts, NACA Tech Notes, TN 3331, 1955, 628-635, 1985.
• [7] ALI T. M.: Flow through square duct with rough ribs, Ph. D Thesis, Imperial College, Uni. of London, U.K, 1978.
• [8] KHAN R. K, ALI M. A. T. AND AKHANDA M. A. R. Heat transfer and flow characteristics in developing region through square ducts with smooth and ribbed walls, Int. Conf. of Mechanical Engineering, December 26-28, 2001, Dhaka, Bangladesh, Vol. II, Section-II (Thermal Engineering), 79-86.
• [9] KHAN. R. K., ALI M. A. T. AND AKHANDA M. A. R.: Study on friction in developing flow through a smooth square duct, Int. Conf. of Mechanical Engineering, December 26-28, 2001, Dhaka, Bangladesh, Vol. II, Section-IV (Fluid Mechanics), 203-208.
• [10] KHAN R. K., ALI M. A. T. AND AKHANDA M. A. R.: Forced convection heat transfer in developing flow through a square duct with asymmetric heating, 9th Asian Congress of Fluid Mechanics, May 27-31, 2002 Isfahan, Iran.
• [11] KHAN R. K., ALI M. A. T. AND AKHANDA M. A. R.: Comparative study on forced convection heat transfer in developing region through square ducts with a bottom ribbed and a smooth surface, accepted for publication in J. of the Institutions of Engineers (India)