Abstract




 
   

IJE TRANSACTIONS B: Applications Vol. 24, No. 2 (July 2011) 139-146   

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  PERFORMANCE OF SST K-ω TURBULENCE MODEL FOR COMPUTATION OF VISCOUS DRAG OF AXISYMMETRIC UNDERWATER BODIES
 
 

M.  M.  Karim*

 

Dept. of Naval Architecture and Marine Engineering, Bangladesh University of Engineering and Technology (BUET), Dhaka-1000, Bangladesh

 mmkarim@name.buet.ac.bd

 

M.  M.  Rahman

 

Doctoral Student, Department of Naval Architecture and Ocean Engineering, Graduate School of Engineering,

Osaka University, Japan

M.  A.  Alim

 

Department of Mathematics, Bangladesh University of Engineering and Technology (BUET)

 Dhaka-1000, Bangladesh

maalim@math.buet.ac.bd

 

*Corresponding Author

 
 
( Received: November 20, 2009 – Accepted in Revised Form: May 25, 2010 )
 
 

Abstract    This paper presents 2-D finite volume method for computation of viscous drag based on Reynolds-averaged Navier-Stokes (RANS) equations. Computations are performed on bare submarine hull DREA and six axisymmetric bodies of revolution with a number of length-diameter (L/D) ratios ranging from 4 to 10. Both structured and unstructured grids are used to discretize the domain around the bodies. Different turbulence models have been tested to simulate turbulent flow. Finally, results computed by 2-D method are compared with published experimental results and found satisfactory.

 

Keywords    axisymmetric body of revolution, underwater vehicle, viscous drag, CFD, turbulence model

 

چکیده    چكيده اين مقاله براي محاسبه گرانروي درگ به روش حجم محدود بر اساس معادلات رينولدز- متوسط ناويه استوكس (RANS) بصورت دو بعدي را نشان ميدهد. محاسبات بر روي زيردريايي برهنه(DREA) و جسم شش بعدي حاصل از دوران با نسبت طول به قطر (L/D) 4 تا 10 صورت گرفته است. دامنه اطراف اجسام با هر دو شبكه شكل يافته و يا شكل نيافته منقطع شده است. براي آزمون صحت مدل سازي جريان آشفته از مدل هاي مختلف آشفته استفاده گرديد. مقايسه نتايج پيش بيني شده از روش 2 بعدي با نتايج آزمايشي/عددي همخواني مطلوبي داشته است.

References   

 

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