Using computational fluid dynamics (CFD) in agriculture field especially in designing greenhouses is becoming ever more important to reduce the energy consumption, wherefore a comparison between the experimental and numerical results increasing the credibility of theoretical studies and therefore depending on it. The experimental study located at October 6 University, 6 October city, Giza, Egypt in august. Standard Κ-ϵ model used for the (CFD) numerical study implemented for comparison between the experimental and numerical measurements. A good qualitative and quantitative agreement was found between the numerical results and the experimental measurements.