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A, Tamil Chandran, T, Suthakar, KR, Balasubramanian, S, Rammohan, Chandapillai, Jacob. (1401). Numerical prediction of the drag coefficient of bluff bodies in three-dimensional pipe flow. فناوری آموزش, 12(1), 13-29. doi: 10.22061/jcarme.2021.7114.1931
Tamil Chandran A; Suthakar T; Balasubramanian KR; Rammohan S; Jacob Chandapillai. "Numerical prediction of the drag coefficient of bluff bodies in three-dimensional pipe flow". فناوری آموزش, 12, 1, 1401, 13-29. doi: 10.22061/jcarme.2021.7114.1931
A, Tamil Chandran, T, Suthakar, KR, Balasubramanian, S, Rammohan, Chandapillai, Jacob. (1401). 'Numerical prediction of the drag coefficient of bluff bodies in three-dimensional pipe flow', فناوری آموزش, 12(1), pp. 13-29. doi: 10.22061/jcarme.2021.7114.1931
A, Tamil Chandran, T, Suthakar, KR, Balasubramanian, S, Rammohan, Chandapillai, Jacob. Numerical prediction of the drag coefficient of bluff bodies in three-dimensional pipe flow. فناوری آموزش, 1401; 12(1): 13-29. doi: 10.22061/jcarme.2021.7114.1931

Numerical prediction of the drag coefficient of bluff bodies in three-dimensional pipe flow

Journal of Computational & Applied Research in Mechanical Engineering (JCARME)
مقاله 2، دوره 12، شماره 1 - شماره پیاپی 23، آبان 2022، صفحه 13-29    اصل مقاله (1.77 M)
نوع مقاله: Research Paper
شناسه دیجیتال (DOI): 10.22061/jcarme.2021.7114.1931
نویسندگان
Tamil Chandran A* 1؛ Suthakar T2؛ Balasubramanian KR2؛ Rammohan S3؛ Jacob Chandapillai4
1Fluid Control research Institute, Kanjikode west palakkad kerala
2Department of Mechanical Engineering, National Institute of Technology- Trichirapallai
3Fluid Control research Institute, Palakkad, Kerala
4Fluid Control Research Institute, Kanjikode west, Palakkad, Kerala,
تاریخ دریافت: 23 تیر 1399،  تاریخ بازنگری: 08 آبان 1400،  تاریخ پذیرش: 12 آبان 1400 
چکیده
Abstract
Numerical analysis of drag coefficient of three-dimensional bluff bodies such as flat plates, cylinder, triangular prism, semicircular profiles located in the flow path of the pipe was performed. Bluff bodies of various lengths are analysed using a turbulence model. The effect of bluff body thickness on drag coefficient was analysed. A significant observation of the study is the reduction in drag coefficient with an increase in thickness. Effect of pressure coefficient on drag coefficient was evaluated. The study confirms that frictional coefficient has negligible effect on drag coefficient in the studied Reynolds number range. Change in drag coefficient over a wide range of Reynolds number was studied and is reported. Irrespective of geometry and length, the study indicates that there is a significant difference in drag coefficient between two dimensional and three dimensional simulation studies. It is also concluded that the length  of a bluff body in a confined domain  has a significant effect on its drag coefficient.
کلیدواژه‌ها
Drag coefficient؛ Pressure coefficient؛ Turbulence model؛ Computational fluid dynamics؛ Bluff body؛ Friction coefficient
مراجع

[1] W. H. Hucho, Aerodynamics of Road Vehicles: From Fluid Mechanics to Vehicle Engineering, 1st ed, Butterworth -Heinemann Ltd, (1987). 

[2] B. E. Launder and D. B. Spalding, “The numerical computation of turbulent flows”, J. Comput. Methods Appl. Mech. Eng., Vol. 3, No. 2, pp. 269-289, (1974).

 [3] R. D Belvins, Applied Fluid Dynamics Handbook, (1984), Van Noistrand reinhand company Newyark. ISBN-13: 978-1575241821

[4] C. Norberg, “Fluctuating lift on a circular cylinder: review and new measurements”, J. Fluids Struct., Vol. 17, No. 1, pp. 57-96, (2003), ISSN 0889-9746.

[5]     F. Gu, J. S. Wang, X. Q. Qiao and Z. Huang, “Pressure distribution, fluctuating forces and vortex shedding behavior of circular cylinder with rotatable splitter plates”, J. Fluids Struct., Vol. 28, pp. 263-278, (2012), ISSN 0889-9746.

[6] B. Zhou, X. Wang, W. M. Gho and S. K. Tan, “Force and flow characteristics of a circular cylinder with uniform surface roughness at subcritical Reynolds numbers”, Appl. Ocean Res., Vol. 49, pp. 20-26, (2015). 

[7] B. Zhou, X. Wang, W. Guo, J. Zheng and S. K. Tan, "Experimental measurements of the drag force and the near-wake flow patterns of a longitudinally grooved cylinder”, J. Wind Eng. Ind. Aerodyn., Vol. 145, pp. 30–41, (2015).

[8] I. P. Castro, “Wake characteristics of two – dimensional perforated plates normal to an air-stream”, J. Fluid Mech., Vol. 46, No. 3, pp. 599-609, (1971). 

[9] Lisoski and D. L. Ashton “Nominally two-dimensional flow about a normal flat plate”, Ph.D. Thesis, California Institute of Technology, (1993). 

 [10] B. Rostane, A. Khaled and S. Abboudi, “Influence of insertion of holes in the middle of obstacles on the flow around a surface-mounted cube”, J. Comput. Appl. Res. Mech. Eng., Vol. 9, No. 1, pp. 77-87, (2019).

 [11] A. Khalkhali and H. Safikhani, “Applying evolutionary optimization on the airfoil design”, J. Comput. Appl. Res. Mech. Eng., Vol. 2, No. 1, pp. 51-62, (2012).  

[12] F. M. Najjar and S. P. Vanka, “Effects of intrinsic three-dimensionality on the drag characteristics of a normal flat plate”, Phys. Fluids, Vol. 7, pp. 2516–2518, (1995). 

[13] A. Fage and F. C. Johansen, “On the flow of air behind an inclined flat plate of infinite span, “Proc. R. Soc. Lond.”. Series A, Vol. 116, No. 773, pp. 170-197 (1927).   

[14] P. Dey and A. Kr. Das, “Numerical analysis of drag and lift reduction of square cylinder”, Int. J. Eng. Sci. Technol., Vol.18, No. 4, pp. 758-768, (2015).

[15]  A. M. Bimbato, L. A. A. Pereira and M. H. Hirata, “Simulation of viscous flow around a circular cylinder near a moving ground”, J. Braz. Soc. Mech. Sci. Eng., Vol. 31, No. 3, pp. 243-252 (2009). 

[16] K. Karthik, M. Vishnu, S. Vengadesan and S. K. Bhattacharyya, “Optimization of bluff bodies for aerodynamic drag and sound reduction using CFD analysis”, J. Wind Eng. Ind. Aerodyn., Vol. 174, pp. 133-140, (2018), ISSN 0167-6105.

[17]  X. Tian, M. C. Ong, J. Yang and D. Myrhaug, “Large-eddy simulation of the flow normal to a flat plate including corner effects at a high Reynolds number”, J. Fluids Struct., Vol. 49, pp. 149-169, (2014).

[18] S. Chakraborthy, “Course note on Introduction to turbulence modeling module No 1”, IIT, Kharagpur.

[19] F. H Harlow and P. I. Nakayama, "Transport of turbulence energy decay rate", Los Alamos Sci. Lab., University California Report LA-3854, (1968). DOI:10.2172/4556905, 

[20] B. Launder, A. Morse, W. Rodi and D. B. Spaldiug, "The prediction of free shear flows - A comparison of the performance of six turbulence models", Proc. of NASA Conf. on Free Shear Flows, Langley (1972). Corpus ID: 118099033.

[21]   N. Koutsourakis, J. G. Bartzis and N. C. Markatos, "Evaluation of Reynolds stress, k-ε and RNG k-ε turbulence models in street canyon flows using various experimental datasets", Environ. Fluid Mech., Vol. 12, No.4, pp. 379–403, (2012).

[22] ANSYS Meshing User's Guide Release 15.0, (2013)

[23] F. M. Najjar and S. Balachandar, “Low-frequency unsteadiness in the wake of a normal flat plate”, J. Fluid Mech., Vol 370, pp. 101–147, (1998).

[24]   V. D. Narasimhamurthy and H. I. Andersson, “Numerical simulation of the turbulent wake behind a normal flat plate”, Int. J. Heat Fluid Flow, Vol. 30, No. 6, pp. 1037-1043, (2009). 

[25] B. R. Munson, A. P. Rothmayer, T. H. Okiishi and W. W. Huebsch, "Fundamentals of Fluid Mechanics", 16th edition, "John Wiley and Sons, Inc, (2009) ISBN-13:978-1118116135.

[26] E. Achenbach, “Distribution of local pressure and skin friction around a circular cylinder in cross-flow up to Re 5e+6”, J. of Fluid Mech., Vol. 34, No. 4, pp. 625–639, (1968). 

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