@xiezhuoyu Nice! 挺有意思
Description 28 Two-scheme Courant number based blending differencing scheme. 29 30 Similar to localBlended but uses a blending factor computed from the 31 face-based Courant number and the lower and upper Courant number limits 32 supplied: 33 \f[ 34 weight = 1 - max(min((Co - Co1)/(Co2 - Co1), 1), 0) 35 \f] 36 where 37 \vartable 38 Co1 | Courant number below which scheme1 is used 39 Co2 | Courant number above which scheme2 is used 40 \endvartable 41 42 The weight applies to the first scheme and 1-weight to the second scheme. 43 44 Example of the CoBlended scheme specification using LUST for Courant numbers 45 less than 1 and linearUpwind for Courant numbers greater than 10: 46 \verbatim 47 divSchemes 48 { 49 . 50 . 51 div(phi,U) Gauss CoBlended 1 LUST grad(U) 10 linearUpwind grad(U); 52 . 53 . 54 } 55 \endverbatim 56 57 SourceFiles 58 CoBlended.C