And fvSchemes: ddtSchemes { default backward; } gradSchemes { default Gauss linear; } //convective terms divSchemes { default Gauss linearUpwind default; div(phi,U) Gauss linearUpwind grad(U); div((nuEff*dev2(T(grad(U))))) Gauss linear; } //diffusive terms laplacianSchemes { default Gauss linear limited corrected 0.5; //non-orthogonality fix } wallDist { method meshWave; } interpolationSchemes { default linear; interpolate(U) linear; } snGradSchemes { default limited corrected 0.5; //corrected. same to laplace schemes }