Study of the Wind Tunnel Effect on the Drag Coefficient (CD) of a Scaled Static Vehicle Model Compared to a Full Scale Computational Fluid Dynamic Model

2011 ◽  
Vol 4 (3) ◽  
pp. 236-245
Author(s):  
Sanwar A. Sunny
Keyword(s):  
Wind Tunnel ◽  
Drag Coefficient ◽  
Dynamic Model ◽  
Computational Fluid Dynamic ◽  
Fluid Dynamic ◽  
Computational Fluid Dynamic Model ◽  
Full Scale ◽  
Tunnel Effect ◽  
Vehicle Model

scholarly journals Numerical Investigation of the Flow around a Feather Shuttlecock with Rotation

Proceedings ◽  
2020 ◽  
Vol 49 (1) ◽  
pp. 28
Author(s):  
John Hart ◽  
Jonathan Potts
Keyword(s):  
Reynolds Number ◽  
Wind Tunnel ◽  
Drag Coefficient ◽  
Numerical Investigation ◽  
Computational Fluid Dynamic ◽  
High Reynolds Number ◽  
Fluid Dynamic ◽  
Flow Structures ◽  
Drag Forces ◽  
High Reynolds

This paper presents the first scale resolving computational fluid dynamic (CFD) investigation of a geometrically realistic feather shuttlecock with rotation at a high Reynolds number. Rotation was found to reduce the drag coefficient of the shuttlecock. However, the drag coefficient is shown to be independent of the Reynolds number for both rotating and statically fixed shuttlecocks. Particular attention is given to the influence of rotation on the development of flow structures. Rotation is shown to have a clear influence on the formation of flow structures particularly from the feather vanes, and aft of the shuttlecock base. This further raises concerns regarding wind tunnel studies that use traditional experimental sting mounts; typically inserted into this aft region, they have potential to compromise both flow structure and resultant drag forces. As CFD does not necessitate use of a sting with proper application, it has great potential for a detailed study and analysis of shuttlecocks.

scholarly journals Pengaruh Kekasaran Permukaan terhadap Performa Slider Bearing Bertekstur dengan Menggunakan Pendekatan CFD

ROTASI ◽  
2019 ◽  
Vol 21 (1) ◽  
pp. 56
Author(s):  
Mohammad Tauviqirrahman ◽  
Mufti M. Suryaman ◽  
Muchammad Muchammad
Keyword(s):  
Dynamic Model ◽  
Computational Fluid Dynamic ◽  
Fluid Dynamic ◽  
Computational Fluid Dynamic Model ◽  
Slider Bearing ◽  
Multi Phase

Dalam teori pelumasan klasik hidrodinamika, asumsi permukaan kontak bearing yang benar-benar halus sering kali digunakan. Meskipun demikian, telah dibuktikan bahwa asumsi tersebut tidak realistis dikarenakan pada umumnya, tidak ada permukaan bearing yang benar-benar halus. Tulisan ini membahas pengaruh kekasaran permukaan terhadap performa slider bearing bertektur dengan menggunakan pendekatan CFD (computational fluid dynamic). Model kavitasi multi-phase digunakan untuk memodelkan fenomena kavitasi yang lebih riil. Performa slider bearing dengan tingkat kekasaran permukaan tertentu dibandingkan dengan slider bearing halus dengan menvariasikan kondisi inersia. Berdasarkan hasil simulasi, ditemukan bahwa tekanan hidrodinamik dan daya dukung beban berkurang dengan bertambahnya kekasaran permukaan. Selain itu, jika bearing dirancang agar memiliki kondisi inersia yang rendah, daya dukung beban akan menjadi lebih besar.

A Patient-Specific Computational Fluid Dynamic Model for Hemodynamic Analysis of Left Ventricle Diastolic Dysfunctions

2015 ◽  
Vol 6 (4) ◽  
pp. 412-429 ◽  
Author(s):  
Vinh-Tan Nguyen ◽  
Stella Nathania Wibowo ◽  
Yue An Leow ◽  
Hoang-Huy Nguyen ◽  
Zhong Liang ◽  
...  
Keyword(s):  
Left Ventricle ◽  
Dynamic Model ◽  
Computational Fluid Dynamic ◽  
Fluid Dynamic ◽  
Computational Fluid Dynamic Model ◽  
Patient Specific
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