Program EDDYBL

408 APPENDIX D. PROGRAM EDDYBLYou will receive a warning if you use the k-e model and the value of y+for the point nearest the surface is less than 0 .1 . Values smaller than 0 .1tend to slow the convergence rate for the k-e model, and may even causeyour run to crash .D .5 .9Selecting a Turbulence ModelIn order to select the k-w model, go to the Turbulence Model sub-menu .Type a T followed by ENTER, and you will find that the fourth quantitylisted is a flag called MODEL . Press ENTER three times to position thearrow in front of MODEL . Change its value to 0 by typing C followed byentering a 0 and pressing ENTER . Note that the highlighted bar below themenu now indicates you are using the k-w model without viscous correction(low-Reynolds-number) terms . Exit back to the main menu .For general reference, there are ten turbulence models implemented inEDDYBL, and the two input parameters MODEL and NVISC are usedto make the selection . The choices are as follows .MODEL NVISC-1 -0 00 11 01 12 02 12 22 32 42 5Turbulence ModelNone (Laminar Flow)k-w, viscous corrections excludedk-w, viscous corrections includedMultiscale, viscous corrections excludedMultiscale, viscous corrections includedk-c, Jones-Launder (1972)k-c, Launder-Sharma (1974)k,-c, Lam-Bremhorst (1981)k-c, Chien (1982)k-e, Yang-Shih (1993)k-c, Fan-Lakshminarayana-Barnett (1993)D .5 .10Logical Unit Numbers and Plotting FilesYour final input-data changes will cause printed output to go to your lineprinter rather than to disk file eddybl.prt . You will also verify that twodisk files named profil.dat and wall.dat will be created that can be used asstarting conditions for another program or as input to a plotting program .Go to the Logical Unit Numbers sub-menu by typing an L, ENTERsequence . The first parameter is IUNIT1 which, by default, is disk fileeddybl.prt . For Lahey, Microsoft or SVS Fortran versions, change its valueto 6 . For all other versions, use your normal operating system procedure to