Acta Univ. Agric. Silvic. Mendelianae Brun. 2008, 56(2), 303-308 | DOI: 10.11118/actaun200856020303

Vliv teploty na dynamickou viskozitu černého piva

Libor Severa1, Josef Los2
1 Ústav techniky a automobilové dopravy, Mendelova zemědělská a lesnická univerzita v Brně, Zemědělská 1, 613 00 Brno, Česká republika
2 Ústav zemědělské, potravinářské a environmentální techniky, Mendelova zemědělská a lesnická univerzita v Brně, Zemědělská 1, 613 00 Brno, Česká republika

Byla sledována dynamická viskozita přesně definovaného černého piva při různých teplotách. Pivo bylo považováno za newtonovskou kapalinu. Viskozita měřená při teplotách od 2 do 90 °C se pohybovala v rozsahu 1,01 až 3,91 mPas. Pro měření reologických hodnot byl použit digitální rotační viskozimetr s geometrií měřící komory válec - válec. Zjištěná experimentální závislost byla modelována pomocí Arrheniova vztahu. Bylo dosaženo velmi uspokojující shody experimentu s modelem R2 = 0,993. Popsán a hodnocen byl též teplotní gradient v meziprostoru mezi válci měřicí komůrky.

pivo, viskozita, modelování

On the influence of temperature on dynamic viscosity of dark beer

Temperature dependence of dark beer dynamic viscosity have been evaluated. The beer samples have been tested in the wide range of temperatures (from 2 to 90 °C) by means of rotary viscometer. The dynamic viscoity ranged from 3.91 to 1.01 mPas. Arrhenius equation have been used to model experimental data with satisfying match R2 = 0.993. Heat gradient in the gap of measuring cell have been described and evaluated.

Keywords: beer, viscosity, modeling

Received: November 11, 2007; Published: November 14, 2014  Show citation

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Severa, L., & Los, J. (2008). On the influence of temperature on dynamic viscosity of dark beer. Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 56(2), 303-308. doi: 10.11118/actaun200856020303
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    References

    1. CARSLAW, H. S. and JAEGER, J. C., 1959: Conduction of heat in solids (2nd ed.). London: Oxford University Press
    2. DILAY, E., VARGAS, J. C. V., AMICO, S. C. and ORDONEZ, J. C., 2006: Modeling, simulation and optimization of a beer pasteurization tunnel, Journal of Food Engineering, Volume 77, Issue 3, 500-513 DOI: 10.1016/j.jfoodeng.2005.07.001 Go to original source...
    3. FRISO, D. and BOLCATO, F., 2004: Rheological properties of some newtonian food liquids, Rivista di Ingegneria Agraria, Vol. 35, No. 2, 75-80
    4. HLAVÁČ, P., 2007: The rheologic properties of dark beer, Proceedings of Research and Teaching of Physics in the Context of University Education, Nitra, 5-6. 6. 2007, pp.169-175
    5. JIN, Y. L., SPPERS, A., PAULSON, A. T., STEWART, R. J., 2004: Effects of β-Glucans and Environmental factors on the viscosities of Wort and Beer, J. Inst. Brew. 110 (2), 104-116 DOI: 10.1002/j.2050-0416.2004.tb00189.x Go to original source...
    6. KERR, W. L., and REID, D. S., 1994: Temperature dependence of the viscosity of sugars and maltodextrins in coexistence with ice, Lebensmittel-Wissenchaft und -Technologie, 27, 225-231 DOI: 10.1006/fstl.1994.1046 Go to original source...
    7. LAGARIQUE, S., ALVAREZ, G., and FLICK, D., 2007: Rheological characterization of starch based food productsunder unsteady temperature cinditions and high heating rate, Journal of Food Engineering, 81, pp.273-281 DOI: 10.1016/j.jfoodeng.2006.01.072 Go to original source...
    8. LI, Y., LU, J., GU, G., SHI, Z. and MAO, Z.: Studies on water-extractable arabinoxylans during malting and brewering, Food Chemistry 93, 33-38, 2005 DOI: 10.1016/j.foodchem.2004.08.040 Go to original source...
    9. MALTINI, E. and MANZOCCO, L., 1997: Experimental and predicted viscosities of model solutions at temperatures above the glass transitions. Proceedings of ISOPOW, 7, 57-60
    10. MALTINI, E. and ANESE, M., 1995: Evaluation of viscosities of amorphous phases in partially frozen systems by WLF kinetics and glass transition temperatures. Food Research International, 28, 367-372 DOI: 10.1016/0963-9969(95)00006-8 Go to original source...
    11. NINDO, C. I., TANG, J., POWERS, J. R. and SINGH, P., 2005: Viscosity of blueberry and raspberry juices for processing applications, Journal of Food Engineering 69, 343-350 DOI: 10.1016/j.jfoodeng.2004.08.025 Go to original source...
    12. ROHSENOW, W. M., HARTNETT, J. P., and GANIC, E. N., 1973: Handbook of heat transfer: fundamentals (2nd ed.). McGraw Hill
    13. STEFFE, J. F., 1996: Rheological methods in food process engineering (2nd ed.). East Lansing, MI, USA: Freeman Press

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