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Use of the correct heat conduction–convection equation as basis for heat-pulse sap flow methods in anisotropic wood

Maurits Vandegehuchte UGent and Kathy Steppe UGent (2012) JOURNAL OF EXPERIMENTAL BOTANY. 63(8). p.2833-2839
abstract
Heat-pulse methods to determine sap flux density in trees are founded on the theory of heat conduction and heat convection in an isotropic medium. However, sapwood is clearly anisotropic, implying a difference in thermal conductivity along and across the grain, and hence necessitates the theory for an anisotropic medium. This difference in thermal conductivities, which can be up to 50%, is, however, not taken into account in the key equation leading to the currently available heat-pulse methods. Despite this major flaw, the methods remain theoretically correct as they are based on derivations of the key equation, ruling out any anisotropic aspects. The importance of specifying the thermal characteristics of the sapwood according to axial, tangential or radial direction is revealed as well as referring to and using the proper anisotropic theory in order to avoid confusion and misinterpretation of thermal properties when dealing with sap flux density measurements or erroneous results when modelling heat transport in sapwood.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
thermal diffusivity, sap flow, thermal conductivity, heat dissipation, Heat capacity, TREES
journal title
JOURNAL OF EXPERIMENTAL BOTANY
J. Exp. Bot.
volume
63
issue
8
pages
2833 - 2839
Web of Science type
Article
Web of Science id
000304196900001
JCR category
PLANT SCIENCES
JCR impact factor
5.242 (2012)
JCR rank
13/193 (2012)
JCR quartile
1 (2012)
ISSN
0022-0957
DOI
10.1093/jxb/ers041
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
2064792
handle
http://hdl.handle.net/1854/LU-2064792
date created
2012-03-12 19:35:33
date last changed
2012-07-06 10:06:29
@article{2064792,
  abstract     = {Heat-pulse methods to determine sap flux density in trees are founded on the theory of heat conduction and heat convection in an isotropic medium. However, sapwood is clearly anisotropic, implying a difference in thermal conductivity along and across the grain, and hence necessitates the theory for an anisotropic medium. This difference in thermal conductivities, which can be up to 50\%, is, however, not taken into account in the key equation leading to the currently available heat-pulse methods. Despite this major flaw, the methods remain theoretically correct as they are based on derivations of the key equation, ruling out any anisotropic aspects. The importance of specifying the thermal characteristics of the sapwood according to axial, tangential or radial direction is revealed as well as referring to and using the proper anisotropic theory in order to avoid confusion and misinterpretation of thermal properties when dealing with sap flux density measurements or erroneous results when modelling heat transport in sapwood.},
  author       = {Vandegehuchte, Maurits and Steppe, Kathy},
  issn         = {0022-0957},
  journal      = {JOURNAL OF EXPERIMENTAL BOTANY},
  keyword      = {thermal diffusivity,sap flow,thermal conductivity,heat dissipation,Heat capacity,TREES},
  language     = {eng},
  number       = {8},
  pages        = {2833--2839},
  title        = {Use of the correct heat conduction--convection equation as basis for heat-pulse sap flow methods in anisotropic wood},
  url          = {http://dx.doi.org/10.1093/jxb/ers041},
  volume       = {63},
  year         = {2012},
}

Chicago
Vandegehuchte, Maurits, and Kathy Steppe. 2012. “Use of the Correct Heat Conduction–convection Equation as Basis for Heat-pulse Sap Flow Methods in Anisotropic Wood.” Journal of Experimental Botany 63 (8): 2833–2839.
APA
Vandegehuchte, Maurits, & Steppe, K. (2012). Use of the correct heat conduction–convection equation as basis for heat-pulse sap flow methods in anisotropic wood. JOURNAL OF EXPERIMENTAL BOTANY, 63(8), 2833–2839.
Vancouver
1.
Vandegehuchte M, Steppe K. Use of the correct heat conduction–convection equation as basis for heat-pulse sap flow methods in anisotropic wood. JOURNAL OF EXPERIMENTAL BOTANY. 2012;63(8):2833–9.
MLA
Vandegehuchte, Maurits, and Kathy Steppe. “Use of the Correct Heat Conduction–convection Equation as Basis for Heat-pulse Sap Flow Methods in Anisotropic Wood.” JOURNAL OF EXPERIMENTAL BOTANY 63.8 (2012): 2833–2839. Print.