@article{fdi:010042540, title = {{CFD} based determination of temperature and humidity at leaf surface}, author = {{R}oy, {J}. {C}. and {V}idal, {C}laire and {F}argues, {J}. and {B}oulard, {T}.}, editor = {}, language = {{ENG}}, abstract = {{A} numerical model based on the energy balance has been developed for computing with the {F}luent {CFD} code temperature and humidity at leaf surface for low light levels. {C}rop transpiration and aerial flows were coupled and a single parameter model for the stomatal response of leaves to radiation flux has been considered. {V}alidation of the results at leaf level has required an experimental setup based on {M}unger cells to quantify temperature, relative humidity and the different heat fluxes for single bean leaves. {E}xperiments have been performed for three alternate low light/dark periods. {I}t was shown that the agreement between numerical and experimental results increases with the airflow intensity: the results are in good agreement for air relative humidity and the absolute error is lesser than 10% while it can reach 1,,{C} for air temperature due to the weak experimental temperature difference between inlet and outlet flows. {T}he terms of the heat balance on the leaf surface have also been compared and variable agreements have been found, relative error varying from 10 to 40%. {T}he numerical results highlight their dependence on the minimal stomatal resistance value, numerical and experimental results agreement increasing with minimal stomatal resistance varying from 66 to 200 s m(-1). {T}hese results underline the importance of the values of the parameters included in the model used for {CFD} simulations of heat and mass transfer on single leaf surface and by extension to transfers with whole crops and particularly protected crops. 2007 {E}lsevier {B}.{V} {A}ll rights reserved.}, keywords = {computer simulation ; leaf surface ; evapotranspiration ; stomatal resistance ; integrated pest management}, booktitle = {}, journal = {{C}omputers and {E}lectronics in {A}griculture}, volume = {61}, numero = {2}, pages = {201--212}, ISSN = {0168-1699}, year = {2008}, DOI = {10.1016/j.compag.2007.11.007}, URL = {https://www.documentation.ird.fr/hor/fdi:010042540}, }