Finite element analysis of the sap flow measurement method with continuous needle heating in the sapwood of trees

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F14%3A00223834" target="_blank" >RIV/62156489:43410/14:00223834 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Finite element analysis of the sap flow measurement method with continuous needle heating in the sapwood of trees

Popis výsledku v původním jazyce

Water flow represents the biggest energy flow in vegetation which also causes its magnificent climatic effect. From all the water taken up by plants, the majority is transpired, leading to leaf cooling (associated with the heat of vaporization) and onlyminor amounts of water are consumed by all the other processes (such as photosynthesis transport of assimilates, growth, etc.). The transpiration can be estimated through the measurement of sap flow rates in a tree stem. A series of measurement methods were developed for this purpose and they are mostly based on thermodynamic principles. This paper deals with the numerical analysis of the sap flow measurement method based on the continuous needle heating of a stem segment, the measurement of temperaturedifferences using the thermocouples around the heated domain and sap flow calculation from the temperature differences. An appropriate model of heat transfer in the sapwood of trees is derived and solved. The model is based on a partial

Název v anglickém jazyce

Finite element analysis of the sap flow measurement method with continuous needle heating in the sapwood of trees

Popis výsledku anglicky

Water flow represents the biggest energy flow in vegetation which also causes its magnificent climatic effect. From all the water taken up by plants, the majority is transpired, leading to leaf cooling (associated with the heat of vaporization) and onlyminor amounts of water are consumed by all the other processes (such as photosynthesis transport of assimilates, growth, etc.). The transpiration can be estimated through the measurement of sap flow rates in a tree stem. A series of measurement methods were developed for this purpose and they are mostly based on thermodynamic principles. This paper deals with the numerical analysis of the sap flow measurement method based on the continuous needle heating of a stem segment, the measurement of temperaturedifferences using the thermocouples around the heated domain and sap flow calculation from the temperature differences. An appropriate model of heat transfer in the sapwood of trees is derived and solved. The model is based on a partial

Druh

D - Stať ve sborníku

CEP obor

BJ - Termodynamika

OECD FORD obor

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Projekt

<a href="/cs/project/EE2.3.30.0017" target="_blank" >EE2.3.30.0017: Postdoktorandi v oborech biologických věd na MENDELU</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2014

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Heat Transfer 2014 13th International Conference on Simulation and Experiments in Heat Transfer and its Applications

ISBN

978-1-84564-794-0

ISSN

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e-ISSN

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Počet stran výsledku

9

Strana od-do

241-249

Název nakladatele

WIT Press

Místo vydání

Ashurst Lodge, Ashurst, Southampton

Místo konání akce

La Coruna

Datum konání akce

1. 1. 2014

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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