CFD modelling of the microclimate of a cultivated greenhouse: A validation study between experimental and numerical results

IF 1.1 Q3 Engineering

Journal of Thermal Engineering Pub Date : 2023-10-17 DOI:10.18186/thermal.1370719

Soumaïla TIGAMPO, Sami KOOLI, Nizar Ben SALAH, Walid FOUDHIL, Reda ERRAIS, Sadok Ben JABRALLAH, Vincent SAMBOU

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引用次数: 0

Abstract

In this work, we present the validation of a numerical model of a greenhouse thermally in-sulated on three sides with a tomato crop. A CFD software (Ansys-Fluent) was used to solve the numerical model. The discrete ordinate model was included to solve the radiative trans-fer equation. The results of the numerical model were compared with the values of air tem-perature observations at different points in the greenhouse. Good agreement was obtained between the simulated and measured values, with coefficients of determination R2 = 0.77, R2 = 0.84, R2 = 0.99, and R2 = 0.89 for the temperatures of the points 10 cm, 80 cm, and 210 cm above the ground and the average temperature in the greenhouse, respectively. A third-order polynomial curve was drawn between the simulated and measured values of relative humidity in the greenhouse. These R2 values are 0.9786 and 0.7165, the simulated and measured relative humidity, respectively. The simulation results showed low velocity values with an average of 0.525 m/s located between 1.5 m and 2 m from the ground.

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栽培温室小气候的CFD模拟:实验与数值结果的验证研究

在这项工作中，我们提出了一个三面绝热温室与番茄作物的数值模型的验证。采用CFD软件Ansys-Fluent对数值模型进行求解。采用离散坐标模型求解辐射传递方程。将数值模拟结果与温室内不同地点的气温观测值进行了比较。模拟值与实测值吻合较好，离地10 cm、80 cm和210 cm处温度与温室内平均温度的决定系数分别为R2 = 0.77、R2 = 0.84、R2 = 0.99和R2 = 0.89。对温室内相对湿度的模拟值与实测值作了三阶多项式曲线。模拟相对湿度R2为0.9786，实测相对湿度R2为0.7165。模拟结果表明，在距离地面1.5 m ~ 2 m处，平均速度为0.525 m/s。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Thermal Engineering THERMODYNAMICS-

CiteScore

2.40

自引率

18.20%

发文量

审稿时长

4 weeks

期刊介绍： Journal of Thermal Enginering is aimed at giving a recognized platform to students, researchers, research scholars, teachers, authors and other professionals in the field of research in Thermal Engineering subjects, to publish their original and current research work to a wide, international audience. In order to achieve this goal, we will have applied for SCI-Expanded Index in 2021 after having an Impact Factor in 2020. The aim of the journal, published on behalf of Yildiz Technical University in Istanbul-Turkey, is to not only include actual, original and applied studies prepared on the sciences of heat transfer and thermodynamics, and contribute to the literature of engineering sciences on the national and international areas but also help the development of Mechanical Engineering. Engineers and academicians from disciplines of Power Plant Engineering, Energy Engineering, Building Services Engineering, HVAC Engineering, Solar Engineering, Wind Engineering, Nanoengineering, surface engineering, thin film technologies, and Computer Aided Engineering will be expected to benefit from this journal’s outputs.