Appropriate boundary conditions for computational wind engineering models using the k-ϵ turbulence model
Citations
1,619 citations
Cites methods from "Appropriate boundary conditions for..."
...For the inflow boundary conditions, COST recommends the formulas suggested by Richards and Hoxey (1993), in which the vertical profiles for U(z), k(i) and e(z) in the atmospheric boundary layer by assuming a constant shear stress with height are as follows:...
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...For the inflow boundary conditions, COST recommends the formulas suggested by Richards and Hoxey (1993), in which the vertical profiles for U(z), k(i) and e(z) in the atmospheric boundary layer by assuming a constant shear stress with height are as follows: UðzÞ ¼ U ABL k ln zþ z0 z (10) kðzÞ ¼ U…...
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1,165 citations
Cites background or methods from "Appropriate boundary conditions for..."
...For the standard k-ε turbulence model, an appropriate set of inlet profiles and y0-type wall functions was provided by Richards and Hoxey (1993)....
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...…roughness (roughness of the bottom of the computational domain) into the simulation to prevent streamwise gradients in the flow in the upstream and downstream part of the domain, i.e. outside the main disturbance of the flow field by the explicitly modelled obstacles (Richards and Hoxey, 1993)....
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...As also indicated by Richards and Hoxey (1993), specific attention is needed for the boundary condition at the top of the domain....
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...…domain is often significantly lower than the ABL height, these profiles are generally simplified by assuming a constant shear stress with height (Richards and Hoxey, 1993): + = 0 0 * y yy ln κ u U(y) ABL (1) µ 2* C u k(y) ABL= (2) )y(yκ u ε(y) 0 3* ABL + = (3) where y is the height…...
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...This set of requirements has been distilled from various sources including CFD literature and CFD software manuals (Richards and Hoxey, 1993; Franke et al., 2004; Fluent Inc., 2005; Ansys Ltd., 2005): (1) A sufficiently high mesh resolution in the vertical direction close to the bottom of the…...
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627 citations
Cites background or methods from "Appropriate boundary conditions for..."
...When using specific values for the turbulence model constants (see [210]), these expressions are an analytical solution to the RANS equations and the two equations of the standard k-ε model....
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...The most often used profiles for RANS CFD simulations in urban physics and wind engineering are those presented by Richards and Hoxey in their pioneering 1993 paper on “Appropriate boundary conditions for computational wind engineering models using the k-ε turbulence model” [210]:...
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...Accurate simulation of ABL flow in the computational domain is imperative for accurate and reliable simulation of the related urban physics processes [210-218]....
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References
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