American Journal of Civil Engineering
Volume 3, Issue 2-2, March 2015, Pages: 33-37
Received: Jan. 16, 2015;
Accepted: Jan. 19, 2015;
Published: Feb. 12, 2015
Views 2660 Downloads 233
Hamid Reza Madihi, Graduate Faculty of Environment, Tehran University, Tehran, Iran
Sina Bani Amerian, Graduate Faculty of Environment, Tehran University, Tehran, Iran
Usual uncertainties in computational fluid dynamics (CFD) results include numerical errors, modeling errors, program bugs, mistakes in input parameters and boundary conditions. The errors can be assessed using itemized results from the CFD program together with its documentation. Each uncertainty can be assessed by evaluating the variables against each other, parameter responsiveness examinations and testing for simplified items. The role is made easier if the program is as transparent as possible. This means that the user can see the values of all the pertinent variables and mediatory results for the whole computational domain. Together with an extensive collection of documents of the computer program that includes all the formulas used, the user can be able to find the causes of suspect results, including an estimation of possible bugs. An important tool in the testing of a CFD program is using simplified cases, generally channels with uniform one-dimensional flow.
Hamid Reza Madihi,
Sina Bani Amerian,
Evaluating Methods for 3D CFD Models in Sediment Transport Computations, American Journal of Civil Engineering. Special Issue: Research and Practices of Civil Engineering in Developing Countries.
Vol. 3, No. 2-2,
2015, pp. 33-37.
Baranya, S. and Jozsa, J.) “Morphological modeling of a sand-bed reach in the Hungarian Danube”, Proceedings of the 33rd Congress of the International Association of Hydraulic Engineering and Research, Vancouver, Canada, 2009.
T. Fischer-Antze, N. R. B. Olsen. and D.Gutknecht, "Three-dimensional CFD modeling of morphological bed changes in the Danube River", Water Resources Research, 44, W09422,doi:10.1029/2007WR006402,2008.
T.Fischer-Antze,N., Ruether,.,N.R.B Olsen, and D .Gutknecht,. "3D modeling of non-uniform sediment transport in a channel bend with unsteady flow", Journal of Hydraulic Engineering and Research, Vol. 47, No. 5, pp. 670-675, 2009.
H. Schlichting, "Boundary layer theory", McGraw-Hill, 1979.
M.Abboltt, An introduction to the Method of characteristics, Thames and Hudsun, 1966.
M.Abotte, Computational Hydraulics, Pitman, 1979.
F.Henderson,Open Channel Flow, Macmillan,1996.
W.Gray and G.. Pinder, On the relationship between the FEand FD method, Int.j.Num. Methods Engng, Vol.12, No.9, 1976.
S.Nakamura, Computational Method Engineering and Science, Wiley,1997.
A.Raudkivi and R Callander, Advanced Fluid Mechanics, Arnold, 1975.
R.H Gallagher(ED).Finite Element Techniques for Fluid Flow, Newnes Bruteerworths,1976.
R. Hamming, Introduction to Applied Numerical Analysis, McGraw-Hill,1971.
E.Isaaacson and H. Keller, Analysis of Numerical Methods, Willy, 1966.