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Abstract ▼ AI-Helper

It is the purpose to revival of the neutral atmosphere boundary layer by way of computational fluid dynamics. Using the standard k-ε turbulent model, it is inspected how the inflow characteristics remains along the fetch of the computational domain. The mean wind velocity is applied with the power f...

It is the purpose to revival of the neutral atmosphere boundary layer by way of computational fluid dynamics. Using the standard k-ε turbulent model, it is inspected how the inflow characteristics remains along the fetch of the computational domain. The mean wind velocity is applied with the power form described on the code of KBC- 2009 according to four terrain category, and with the logarithmic form fitted from the power format. The corresponding turbulent kinetic energy, k, and turbulent dissipation rate, are used, which are defined semi-analytically from the code. The analysis is performed by modifying the roughness height and three constants of the turbulent model according to the terrain category. The flow characteristics is represented properly by CFD whose results have no considerable difference in the two proposed formats. Logarithmic profile is preferred to the power profile in the keeping of inflow characteristics. And the wind characteristics remains well along the fetch as its surface roughness becomes smooth. A boundary condition is necessary to consider the roughness height within the first finite fluid element next to the surface boundary.

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