1. bookVolume 16 (2016): Issue 2 (April 2016)
Journal Details
License
Format
Journal
eISSN
1335-8871
First Published
07 Mar 2008
Publication timeframe
6 times per year
Languages
English
access type Open Access

The Effects of Fluid Viscosity on the Orifice Rotameter

Published Online: 06 May 2016
Volume & Issue: Volume 16 (2016) - Issue 2 (April 2016)
Page range: 87 - 95
Received: 11 Nov 2015
Accepted: 05 Apr 2016
Journal Details
License
Format
Journal
eISSN
1335-8871
First Published
07 Mar 2008
Publication timeframe
6 times per year
Languages
English
Abstract

Due to the viscous shear stress, there is an obvious error between the real flow rate and the rotameter indication for measuring viscous fluid medium. At 50 cSt the maximum error of DN40 orifice rotameter is up to 35 %. The fluid viscosity effects on the orifice rotameter are investigated using experimental and theoretical models. Wall jet and concentric annulus laminar theories were adapted to study the influence of viscosity. And a new formula is obtained for calculating the flow rate of viscous fluid. The experimental data were analyzed and compared with the calculated results. At high viscosity the maximum theoretical results error is 6.3 %, indicating that the proposed measurement model has very good applicability.

Keywords

[1] Head, V.P., Hatboro, P.A. (1954). Coefficients of float-type variable-area flowmeters. Transactions of the ASME, 76, 851-862.10.1115/1.4014989Search in Google Scholar

[2] Schoenborn, E.M., Colburn, A.P. (1939). The flow mechanism and performance of the rotameter. Transactions of the American Institute of Chemical Engineers, 35, 359-389.Search in Google Scholar

[3] Whitewell, J.C., Plumb, D.S. (1939). Correlation of rotameter flow rates. Industrial & Engineering Chemistry, 31 (4), 451-456.10.1021/ie50352a012Search in Google Scholar

[4] Polentz, L.M. (1961). Theory and operation of rotameters. Instruments & Control Systems, 34, 1048-1051.Search in Google Scholar

[5] Urata, E. (1979). A new design of float-type variable area flowmeter. Bulletin of JSME, 22 (171), 1212-1219.10.1299/jsme1958.22.1212Search in Google Scholar

[6] Vallascas, R. (1987). New float flowmeter. Review of Scientific Instruments, 58 (8), 1499-1504.10.1063/1.1139387Search in Google Scholar

[7] Liu, C.Y., Lua, A.C., Chan, W.K., Wong, Y.W. (1995). Theoretical and experimental investigations of a capacitance variable area flowmeter. Transactions of the Institute of Measurement and Control, 17 (2), 84-89.10.1177/014233129501700204Search in Google Scholar

[8] Baker, R.C. (2004). The impact of component variation in the manufacturing process on variable area (VA) flowmeter performance. Flow Measurement and Instrumentation, 15 (4), 207-213.10.1016/j.flowmeasinst.2004.03.002Search in Google Scholar

[9] Baker, R.C., Sorbie, I. (2001). A review of the impact of component variation in the manufacturing process on variable area (VA) flowmeter performance. Flow Measurement and Instrumentation , 12 (2), 101-112.10.1016/S0955-5986(01)00004-8Search in Google Scholar

[10] Sondh, H.S., Singh, S.N., Seshadri, V., Gandhi, B.K. (2002). Design and development of variable area orifice meter. Flow Measurement and Instrumentation, 13 (3) 69-73.10.1016/S0955-5986(02)00030-4Search in Google Scholar

[11] Singh, S.N., Gandhi, B.K., Seshadri, V., Chauhan, V.S. (2004). Design of a bluff body for development of variable area orifice-meter. Flow measurement and Instrumentation, 15 (2), 97-103.10.1016/j.flowmeasinst.2003.11.001Search in Google Scholar

[12] Ning, J., Peng, J. (2009). A temperature compensation method based on neural net for metal tube rotameter. In International Conference on Transportation Engineering 2009. ASCE, 2334-2339.10.1061/41039(345)386Search in Google Scholar

[13] Bückle, U., Durst, F., Howe, B., Melling, A. (1992). Investigation of a floating element flowmeter. Flow Measurement and Instrumentation, 3 (4), 215-225.10.1016/0955-5986(92)90019-2Search in Google Scholar

[14] Bückle, U., Durst, F., Köchner, H., Melling, A. (1995). Further investigation of a floating element flowmeter. Flow Measurement and Instrumentation, 6 (1), 75-78.10.1016/0955-5986(95)93460-CSearch in Google Scholar

[15] Turkowski, M. (2004). Influence of fluid properties on the characteristics of a mechanical oscillator flowmeter. Measurement, 35 (1), 11-18.10.1016/j.measurement.2003.10.002Search in Google Scholar

[16] Turkowski, M. (2003). Progress towards the optimization of a mechanical oscillator flowmeter. Flow Measurement and Instrumentation, 14 (1-2), 13-21.10.1016/S0955-5986(02)00091-2Search in Google Scholar

[17] Fisher, K. (1940). Elimination of viscosity as a factor in defining rotameter calibration. Transactions of the AIChE, 86, 857-869.Search in Google Scholar

[18] Miller, R.W. (1983). Flow Measurement Engineering Handbook. McGraw-Hill, 1443-1458.Search in Google Scholar

[19] Levin, H., Escorza, M.M. (1983). Gas flow through rotameters. Industrial & Engineering Chemistry Fundamentals, 22 (2), 163-166.10.1021/i100010a002Search in Google Scholar

[20] Wojtkowiak, J., Popiel, Cz.O. (1996). Viscosity correction factor for rotameter. Journal of Fluids Engineering, 118 (3), 569-573.10.1115/1.2817796Search in Google Scholar

[21] Fredrickson, A.G. (1959). Flow of non-Newtonian fluids in annuli. Ph.D. University of Wisconsin.Search in Google Scholar

[22] Glauert, M.B. (1956). The wall jet. Journal of Fluid Mechanics, 1 (6), 625-643.10.1017/S002211205600041XSearch in Google Scholar

[23] Launder, B.E., Rodi, W. (1979). The turbulent wall jet. Progress in Aerospace Sciences, 19, 81-128.10.1016/0376-0421(79)90002-2Search in Google Scholar

[24] van Hooff, T., Blocken, B., Defraeye, T., Carmeliet, J., van Heijst, G.J.F. (2012). PIV measurements of a plane wall jet in a confined space at transitional slot Reynolds numbers. Experiments in Fluids, 53 (2), 499-517.10.1007/s00348-012-1305-5Search in Google Scholar

[25] Craft, T.J., Launder, B.E. (2001). On the spreading mechanism of the three-dimensional turbulent wall jet. Journal of Fluid Mechanics, 435, 305-326.10.1017/S0022112001003846Search in Google Scholar

[26] Verhoff, A. (1963). The two-dimensional, turbulent wall jet with and without an external free stream. Report No. 626, Princeton University, NJ.Search in Google Scholar

[27] Rajaratnam, N. (1967). Plane turbulent wall jets on rough boundaries . Water Power, 19, 149-153.Search in Google Scholar

[28] Azim, M.A. (2013). On the structure of a plane turbulent wall jet. Journal of Fluids Engineering, 135 (8), 084502.10.1115/1.4024114Search in Google Scholar

[29] Taliev, V.N. (1963). Ventilation Aerodynamics. Moscow: Gosstroiizdat, 1963.Search in Google Scholar

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