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Two-dimensional analysis of heat and mass transfer during drying of a square cylinder (SC) for confined flow with a strong blockage ratio (β = 0.8) was performed using the alternating direction implicit (ADI)-based software. The influence of Reynolds number (Re = 10–50) and moisture diffusivity number (D = 1 × 10−5 − 1 × 10−8 m2/s) on the heat and mass transfer mechanisms was investigated. The convective heat transfer coefficients on SC surfaces were obtained using a commercial software package. The moisture content distributions inside a SC under transient conditions were calculated using the ADI method. The calculations showed that a higher Reynolds number enhances the overall mean Nusselt number and heat transfer coefficient value. The largest mean Nusselt number and heat transfer coefficient values were obtained at the front face of the SC, which makes the greatest contribution to the overall mean Nusselt number and heat transfer coefficient values for all surfaces of the SC. The effect of Reynolds number on the overall drying time was also investigated. Low Reynolds number and moisture diffusivity values lead to an increase in the overall drying time (Δtod). For Re = 10, the Δtod values are 502.19 → 220288 s and for Re = 50, the Δtod values are 126.14 → 70353.21 s for a moisture diffusivity range of D = 1 × 10−5 − 1 × 10−8 m2/s. Δtod-Re = 10/Δtod-Re = 50 ratios are 3.98–3.89 and 3.13 for a moisture diffusivity range of D = 1 × 10−5 − 1 × 10−8 m2/s. Δtod-D2/Δtod-D1 is 7.47 for Re = 10, and Δtod-D3/Δtod-D2 is 7.63 for Re = 50, whereas Δtod-D3/Δtod-D1 is 438.66 for Re = 10, and Δtod-D3/Δtod-D1 is 557.74 for Re = 50. Additionally, iso-moisture contours of SC were presented and relations for Nusselt number and mass transfer coefficient values were derived.
M. Ozgun Korukcu. Numerical modeling of heat and mass transfer characteristics during the forced convection drying of a square cylinder under strong blockage. Numerical Heat Transfer, Part A: Applications 2017, 72, 171 -184.
AMA StyleM. Ozgun Korukcu. Numerical modeling of heat and mass transfer characteristics during the forced convection drying of a square cylinder under strong blockage. Numerical Heat Transfer, Part A: Applications. 2017; 72 (2):171-184.
Chicago/Turabian StyleM. Ozgun Korukcu. 2017. "Numerical modeling of heat and mass transfer characteristics during the forced convection drying of a square cylinder under strong blockage." Numerical Heat Transfer, Part A: Applications 72, no. 2: 171-184.
Mehmet Özgün Korukçu. Investigation of long term wind characteristics and wind energy potential in Bandırma, Turkey. Pamukkale University Journal of Engineering Sciences 2017, 23, 337 -342.
AMA StyleMehmet Özgün Korukçu. Investigation of long term wind characteristics and wind energy potential in Bandırma, Turkey. Pamukkale University Journal of Engineering Sciences. 2017; 23 (4):337-342.
Chicago/Turabian StyleMehmet Özgün Korukçu. 2017. "Investigation of long term wind characteristics and wind energy potential in Bandırma, Turkey." Pamukkale University Journal of Engineering Sciences 23, no. 4: 337-342.
Energy and exergy characteristics of a square cylinder (SC) in confined flow are investigated computationally by numerically handling the steady-state continuity, Navier-Stokes and energy equations in the Reynolds number range of Re = 10–50, where the blockage ratio (β = B/H) is kept constant at the high level of β = 0.8. Computations indicated for the upstream region that, the mean non-dimensional streamwise (u/Uo) and spanwise (v/Uo) velocities attain the values of u/Uo = 0.840®0.879 and v/Uo = 0.236®0.386 (Re = 10®50) on the front-surface of the SC, implying that Reynolds number and blockage have stronger impact on the spanwise momentum activity. It is determined that flows with high Reynolds number interact with the front-surface of the SC developing thinner thermal boundary layers and greater temperature gradients, which promotes the thermal entropy generation values as well. The strict guidance of the throat, not only resulted in the fully developed flow character, but also imposed additional cooling; such that the analysis pointed out the drop of duct wall (y = 0.025 m) non-dimensional temperature values (ζ) from ζ = 0.387®0.926 (Re = 10®50) at xth = 0 mm to ζ = 0.002®0.266 at xth = 40 mm. In the downstream region, spanwise thermal disturbances are evaluated to be most inspectable in the vortex driven region, where the temperature values show decrease trends in the spanwise direction. In the corresponding domain, exergy destruction is determined to grow with Reynolds number and decrease in the streamwise direction (xds = 0®10 mm). Besides, asymmetric entropy distributions as well were recorded due to the comprehensive mixing caused by the vortex system.
M. Ozgun Korukcu. 2D Temperature Analysis of Energy and Exergy Characteristics of Laminar Steady Flow across a Square Cylinder under Strong Blockage. Entropy 2015, 17, 3124 -3151.
AMA StyleM. Ozgun Korukcu. 2D Temperature Analysis of Energy and Exergy Characteristics of Laminar Steady Flow across a Square Cylinder under Strong Blockage. Entropy. 2015; 17 (5):3124-3151.
Chicago/Turabian StyleM. Ozgun Korukcu. 2015. "2D Temperature Analysis of Energy and Exergy Characteristics of Laminar Steady Flow across a Square Cylinder under Strong Blockage." Entropy 17, no. 5: 3124-3151.