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Odun İçerisindeki Sıcaklık Dağılımına Etki Eden Parametrelerin Farklı Sonlu Elemanlar Yazılımları İle İncelenmesi

Year 2018, Volume: 5 Issue: 1, 65 - 79, 31.01.2018
https://doi.org/10.31202/ecjse.349844

Abstract

Bu çalışmada dikdörtgen kesitli odun malzemesinin zorlanmış taşınım ile
ısıtılması işlemi incelenmiştir. Öncelikle akış alanı için korunum denklemleri
(Navier Stokes) bir sonlu eleman programı yardımıyla çözülmüştür. Daha sonra
yüzeydeki ortalama ısı taşınım katsayısı, türbülans modellerinden Standart k-ɛ
türbülans modeli kullanılarak hesaplanmıştır. Isı transferi denklemi zamana
bağlı, yüzey sınır şartları kullanılarak iki farklı sonlu eleman programı ile
çözülmüştür. Malzeme içerisindeki sıcaklık değerleri 3 farklı hız ile (1 - 1,5
- 2 m/s) 200 saniye sonrası için elde edilmiştir. Aynı zamanda Ansys ve Comsol
programlarında farklı hava sıcaklıkları (50°C -80°C -110°C -140°C) için de
analizler yapılmıştır.  Denklemler için matematiksel
model, Fourier ısı iletim kanunu kullanılarak oluşturulmuştur. İki farklı
program kullanılarak yapılan nümerik analizin sonuçları karşılaştırılmıştır.
Ayrıca bu çalışmada elde edilen sonuç ile literatürde bulunan deneysel ve
nümerik çalışmalardan elde edilen sonuçların karşılaştırılması yapılmış ve
uyumlu olduğu görülmüştür.

References

  • Bozkurt, Y., Erdin, N. Ağaç Teknolojisi Ders Kitabı, İ.Ü. Orman Fakültesi, Yayın no: 445, S: 1, 1997, İstanbul.
  • Akkılıç, H., Kaymakcı, A., Ünsal, Ö. Isıl Işlem Uygulanmış Ahşap Malzemenin Dış Cephe Kaplaması Olarak Değerlendirilme Potansiyeli ,7. Ulusal Çatı & Cephe Sempozyumu 3– 4 Nisan 2014 Yıldız Teknik Üniversitesi Beşiktaş – İstanbul.
  • Korkut, S., ve Kocaefe, D. Isıl işlemin odun özellikleri üzerine etkisi, Düzce Üniversitesi Ormancılık Dergisi, 5(2): 11-34, 2009.
  • URL-1 2017. Ahşap çeşitleri, http://www.novaorman.com (son erişim tarihi 23.10.2017)
  • Boonstra, M.J. A two-stage thermal modification of wood. Ph.D. dissertation in cosupervision Ghent University and Universite Henry Poincare - Nancy 1, 297 p. ISBN 978-90-5989-210-1, 2008.
  • Oumarou, N., Kocaefe, D., Kocaefe, Y. ‘’3D-modelling of conjugate heat and mass transfers: Effects of storage conditions and species on wood high temperature treatment’’. International Journal of Heat and Mass Transfer 79, 945–953, 2014.
  • Kumar, C., Karim, A., Koardder, H., Miller, G.J. ‘’Modeling Heat and Mass Transfer Process During Convection Drying of Fruit’’. 4th International Conference on Computational Methods (ICCM 2012), Australia, 2012.
  • Çolakoğlu, M.H. ‘’Determination of Change in Moisture Ratios of Some Woods during Air-Drying by Finite Element Analsysis’’. Journal of Applied Sciences, 9(22), 4091-4094, 2009.
  • Younsi, R., Kocaefe, D., Poncsak, S., Kocaefe, Y., Gastonguay, L. ‘’CFD Modeling and Experimental Validation of Heat and Mass Transfer in Wood Poles Subjected to High Temperatures:a Conjugate Approach’’. Heat Mass Transfer, 44, 1497-1509, 2008.
  • Bonis, M.V., Ruocco, G.A. ‘’Multiphysics Approach to Fundamental Conjugate Drying by Forced Convection’’. Comsol Conference, Hannover, Germany, 2008.
  • Ljung, A.L., Lundström, T.S., Tano, K. ‘’Fluid Flow and Heat Transfer Within and Around a Porous Pellet Placed in İnfinite Space’’. 19th International Symposium on Transport Phenomena, Reykjavik, Island, 2008.
  • Hussain, M.M., Dıncer, I. ‘’Numerical Simulation of Two-Dimensional Heat and Moisture Transfer During Drying of a Rectangular Object’’. Numerical Heat Transfer, Part A: Application: An International Journal of Computation and Methodology, 43:8, 867-878, 2003.
  • Çengel Y,A. Isı ve Kütle Transferi. 3. Baskı, İzmir, Türkiye Güven Bilimsel Yayıncılık, 2011.
  • Irudayaraj, J., Haghighi, K., Stroshine, R.L. ‘’Nonlinear Finite Element Analysis of Coupled Heat and Mass Transfer Problems with an Application to Timber Drying’’. Drying Technology, 8, 731-749, 1990.
  • Lamnatou, C., Papqanicolaou, E., Belessiotis, V., Kyriakis, N. ‘’Conjugate Heat and Mass Transfer From a Drying Rectangular Cylinder in Confined Air Flow’’. Numerical Heat Transfer,Part A, Applications 56 (5),379-405, 2009.
  • Thomas, H.R., Lewis, R.W., Morgan, K. ‘’ An Application of The Finite Element Method to The Drying of Timber’’. Wood Fiber, 11(4),237-243, 1991.
  • Keylwerth, R. The variation of the temperature of wood during the drying of veneers and sawn wood. Holz Roh Werkst. 10(3):87-91, 1952.
  • Comsol Multiphysics 4.3a. Heat Transfer Model Library, ‘’Heat Transfer Module User’s Guide, Chemical Reaction Engineering Module User’s Guide’’. 2012.

Investigation of Parameters Affecting The Temperature Distribution in Wood with Different Finite Element Softwares

Year 2018, Volume: 5 Issue: 1, 65 - 79, 31.01.2018
https://doi.org/10.31202/ecjse.349844

Abstract

In this study,
convective heating process of wood material with rectangular shape was
examined. First of all, Navier Stokes equations were solved by using a finite
element programme for the flow field. After that average heat transfer
coefficient on surface was calculated by using Standart k- ɛ Turbulence Model.
Heat transfer equation were solved with two different finite element programmes
using boundary conditions at the surface dependent on time. Temperature
distributions inside the solid were obtained for three different air velocity
(1 - 1,5 - 2 m/s) for two hundred seconds. Furthermore, the analysis were made
for different air temperatures (50°C -80°C -110°C -140°C) using Ansys and
Comsol programmes. The mathematical model for equations was formed by using
fourier heat conduction law. The results of the numerical analysis which obtain
from the two different programs were compared. Moreover, the results obtained
in this study were compared with the result obtained from a numerical and
experimental studies in the literature and the results were found to be
compatible.

References

  • Bozkurt, Y., Erdin, N. Ağaç Teknolojisi Ders Kitabı, İ.Ü. Orman Fakültesi, Yayın no: 445, S: 1, 1997, İstanbul.
  • Akkılıç, H., Kaymakcı, A., Ünsal, Ö. Isıl Işlem Uygulanmış Ahşap Malzemenin Dış Cephe Kaplaması Olarak Değerlendirilme Potansiyeli ,7. Ulusal Çatı & Cephe Sempozyumu 3– 4 Nisan 2014 Yıldız Teknik Üniversitesi Beşiktaş – İstanbul.
  • Korkut, S., ve Kocaefe, D. Isıl işlemin odun özellikleri üzerine etkisi, Düzce Üniversitesi Ormancılık Dergisi, 5(2): 11-34, 2009.
  • URL-1 2017. Ahşap çeşitleri, http://www.novaorman.com (son erişim tarihi 23.10.2017)
  • Boonstra, M.J. A two-stage thermal modification of wood. Ph.D. dissertation in cosupervision Ghent University and Universite Henry Poincare - Nancy 1, 297 p. ISBN 978-90-5989-210-1, 2008.
  • Oumarou, N., Kocaefe, D., Kocaefe, Y. ‘’3D-modelling of conjugate heat and mass transfers: Effects of storage conditions and species on wood high temperature treatment’’. International Journal of Heat and Mass Transfer 79, 945–953, 2014.
  • Kumar, C., Karim, A., Koardder, H., Miller, G.J. ‘’Modeling Heat and Mass Transfer Process During Convection Drying of Fruit’’. 4th International Conference on Computational Methods (ICCM 2012), Australia, 2012.
  • Çolakoğlu, M.H. ‘’Determination of Change in Moisture Ratios of Some Woods during Air-Drying by Finite Element Analsysis’’. Journal of Applied Sciences, 9(22), 4091-4094, 2009.
  • Younsi, R., Kocaefe, D., Poncsak, S., Kocaefe, Y., Gastonguay, L. ‘’CFD Modeling and Experimental Validation of Heat and Mass Transfer in Wood Poles Subjected to High Temperatures:a Conjugate Approach’’. Heat Mass Transfer, 44, 1497-1509, 2008.
  • Bonis, M.V., Ruocco, G.A. ‘’Multiphysics Approach to Fundamental Conjugate Drying by Forced Convection’’. Comsol Conference, Hannover, Germany, 2008.
  • Ljung, A.L., Lundström, T.S., Tano, K. ‘’Fluid Flow and Heat Transfer Within and Around a Porous Pellet Placed in İnfinite Space’’. 19th International Symposium on Transport Phenomena, Reykjavik, Island, 2008.
  • Hussain, M.M., Dıncer, I. ‘’Numerical Simulation of Two-Dimensional Heat and Moisture Transfer During Drying of a Rectangular Object’’. Numerical Heat Transfer, Part A: Application: An International Journal of Computation and Methodology, 43:8, 867-878, 2003.
  • Çengel Y,A. Isı ve Kütle Transferi. 3. Baskı, İzmir, Türkiye Güven Bilimsel Yayıncılık, 2011.
  • Irudayaraj, J., Haghighi, K., Stroshine, R.L. ‘’Nonlinear Finite Element Analysis of Coupled Heat and Mass Transfer Problems with an Application to Timber Drying’’. Drying Technology, 8, 731-749, 1990.
  • Lamnatou, C., Papqanicolaou, E., Belessiotis, V., Kyriakis, N. ‘’Conjugate Heat and Mass Transfer From a Drying Rectangular Cylinder in Confined Air Flow’’. Numerical Heat Transfer,Part A, Applications 56 (5),379-405, 2009.
  • Thomas, H.R., Lewis, R.W., Morgan, K. ‘’ An Application of The Finite Element Method to The Drying of Timber’’. Wood Fiber, 11(4),237-243, 1991.
  • Keylwerth, R. The variation of the temperature of wood during the drying of veneers and sawn wood. Holz Roh Werkst. 10(3):87-91, 1952.
  • Comsol Multiphysics 4.3a. Heat Transfer Model Library, ‘’Heat Transfer Module User’s Guide, Chemical Reaction Engineering Module User’s Guide’’. 2012.
There are 18 citations in total.

Details

Primary Language Turkish
Subjects Engineering
Journal Section Makaleler
Authors

Ahmet Serhan Canbolat

Burak Türkan

Ömer Kaynaklı

Akın Burak Etemoğlu

Publication Date January 31, 2018
Submission Date November 7, 2017
Acceptance Date December 12, 2017
Published in Issue Year 2018 Volume: 5 Issue: 1

Cite

IEEE A. S. Canbolat, B. Türkan, Ö. Kaynaklı, and A. B. Etemoğlu, “Odun İçerisindeki Sıcaklık Dağılımına Etki Eden Parametrelerin Farklı Sonlu Elemanlar Yazılımları İle İncelenmesi”, ECJSE, vol. 5, no. 1, pp. 65–79, 2018, doi: 10.31202/ecjse.349844.