Bu öğeden alıntı yapmak, öğeye bağlanmak için bu tanımlayıcıyı kullanınız: http://hdl.handle.net/11452/25044
Başlık: Laminar boundary layer development around a circular cylinder: Fluid flow and heat-mass transfer characteristics
Yazarlar: Dinçer, İbrahim
Uludağ Üniversitesi/Mühendislik Fakültesi/Makine Mühendisliği Bölümü.
0000-0002-4976-9027
Özalp, A. Alper
ABI-6888-2020
6506131689
Anahtar kelimeler: Heat transfer
Fluid flow
Mass transfer
Confined flow
Friction coefficient
Moisture diffusivity
Moisture transfer coefficient
Drying
Literature data compilation
Confined square cylinder
Moisture transfer models
Low reynolds-numbers
Forced-convection
Cross-flow
Transfer coefficients
Surface curvature
Drying kinetics
Channel
Thermodynamics
Engineering
Circular cylinders
Confined flow
Diffusion
Fluids
Laminar boundary layer
Moisture control
Nusselt number
Reynolds number
Tribology
Alternating direction implicit method
Boundary layer development
Computational work
Cylinder surface
Drying process
Energy equation
Flow and heat transfer
Fluid flow
Friction coefficient
Friction coefficients
Front face
Heat-mass transfer
Mass transfer coefficient
Moisture contents
Moisture diffusivity
Moisture distribution
Moisture transfer coefficient
Solid contacts
Transfer characteristics
Friction
Yayın Tarihi: Ara-2010
Yayıncı: ASME
Atıf: Özalp, A. A. ve Dinçer, İ. (2010). "Laminar boundary layer development around a circular cylinder: Fluid flow and heat-mass transfer characteristics". Journal of Heat Transfer, 132(12).
Özet: This paper presents a comprehensive computational work on the hydrodynamic, thermal, and mass transfer characteristics of a circular cylinder, subjected to confined flow at the cylinder Reynolds number of Re(d) = 40. As the two-dimensional, steady and incompressible momentum and energy equations are solved using ANSYS-CFX (version II.0), the moisture distributions are computed by a new alternating direction implicit method based software. The significant results, highlighting the influence of blockage (beta = 0.200-0.800) on the flow and heat transfer mechanism and clarifying the combined roles of beta and moisture diffusivity (D = 1 X 10(-8)-1 X 10(-5) m(2)/s) on the mass transfer behavior, are obtained for practical applications. It is shown that the blockage augments the friction coefficients (C(f)) and Nusselt numbers (Nu) on the complete cylinder surface, where the average Nu are evaluated as Nu(ave) = 3.66, 4.05, 4.97, and 6.51 for beta = 0.200, 0.333, 0.571, and 0.800. Moreover, the blockage shifts separation (theta(s)) and maximum C(f) locations (theta(Cf-max)) downstream to the positions of theta(s) = 54.10, 50.20, 41.98, and 37.30 deg and theta(Cf-max) = 51.5, 53.4, 74.9, and 85.4 deg. The highest blockage of beta = 0.800 encourages the downstream backward velocity values, which as a consequence disturbs the boundary layer and weakens the fluid-solid contact. The center and average moisture contents differ significantly at the beginning Of drying process, but in the last 5% of the drying period they vary only by 1.6%. Additionally, higher blockage augments mass transfer coefficients (h(m)) on the overall cylinder surface; however, the growing rate of back face mass transfer coefficients (h(m-bf)) is dominant to that of the front face values (h(m-ff)), with the interpreting ratios of (h) over bar (m-bf)/(h) over bar (m)= 0.50 and 0.57 and h (h) over bar (m-ff)/(h) over bar (m) = 1.50 and 1.43 for beta = 0.200 and 0.800.
URI: https://doi.org/10.1115/1.4002288
http://hdl.handle.net/11452/25044
ISSN: 0022-1481
Koleksiyonlarda Görünür:Scopus
Web of Science

Bu öğenin dosyaları:
Bu öğeyle ilişkili dosya bulunmamaktadır.


DSpace'deki bütün öğeler, aksi belirtilmedikçe, tüm hakları saklı tutulmak şartıyla telif hakkı ile korunmaktadır.