Analiza wrażliwości rozwiązań CFD z użyciem modelu k-e na ,,stałe" modelu turbulencji

• Autorzy: Błazik-Borowa E.

Warianty tytułu

EN

The sensitivity analysis of CFD problems with using the k - e model on "constants" of the turbulence model

• Języki publikacji: PL

Abstrakty

EN

The paper deals the application of the sensitivity analysis in CFD. This method is used to evaluate the influence of assumed ,,constants" of the standard k-e model on obtained steady flow parameters: pressure, velocity components, turbulence kinematics energy, dissipation of turbulence energy and dynamic turbulence viscosity. Differential coefficients fields of the sensitivity analysis show as the flow parameters change versus the ,,constants". These coefficients can be obtained from the analytical or semi-analytical direct differential methods. There are suitable formulae for described methods and exemplary results in the paper. The results of the sensitivity analysis can be useful to check the solution of CFD problems and they can be used to determine correct "constants" of the k-e model.

Słowa kluczowe

PL

analiza wrażliwości; turbulencja; przepływ ustalony; Fluent

EN

sensitivy analysis; turbulence; FLUENT

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Systems : journal of transdisciplinary systems science
• Rocznik: 2006
• Tom: Vol. 11, nr 1
• Strony: 145--152
• Opis fizyczny: bibliogr. 6 poz.

Twórcy

autor

Błazik-Borowa E.

• Politechnika Lubelska, Wydział Inżynierii Budowlanej i Sanitarnej, Katedra Mechaniki Budowli, ul. Nadbystrzycka 40, 20-618 Lublin

Bibliografia

• [1] FLUENT 6.1 Documentation, Fluent Inc, 2003.
• [2] HRENYA CM., BOLIO E.J., CHAKRABARTI D., SINCLAIR J.L., Comparison of Low Reynolds Number Turbulence Models in Predicting Fully Developed Pipe Flow, Chemical Engineering Science, Vol. 50, No. 12, 1995, 1923-1941.
• [3] KLEIBER M., ANTUNEZ H., HIEN T.D., KOWALCZYK P., Parameter Sensitivity in Nonlinear Mechanics, John Wiley & Sons, 1997.
• [4] LAUNDER B.E., SPALDING D.B., Mathematical Models of Turbulence, Academic Press, London and New York, 1972.
• [5] LAUNDER B.E., SPALDING D.B., The Numerical Computation of Turbulent Flows, Computer Methods in Applied Mechanics and Engineering, 3, 1974, 269-289.
• [6] MOHAMMADI B., MOLHO J.I., SANTIAGO J.G., Incomplete Sensitivities for the Design of Minimal Dispersion Fluidic Channels, Comput. Methods Appl. Mech. Engineering, 192, 2003, 4131-4145.