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Dear all,

I want to simulate Ground Heat Exchanger with corrugated tube in AnsysFluent 17.2. Due to temperature fluctuation in the ground, heat applied in the ground is transient. I find the inlet and outlet is too close to the corrugated tube. I am afraid the back flow could affect the simulation result. Hence, I lengthen the inlet section and outlet section (10 * Internal diameter of tube) to make sure that thermal and hydrodynamics flow is fully developed. but I put wall of the extension into Adiabatic condition. Because I want to see the effect heat transfer only in corrugated side. Is my extension methods correct?

Thank you

Best regards