Program EDDYBL

D .5 . RUNNING A GENERAL CASE 399D .5Running a General CaseThis section explores, in detail, all of the salient features of the input-datapreparation utility, SETEBL . You will be guided through the variousmenus and, in the process, you will set up a constant-pressure boundarylayer computation for a Mach 1 freestream . For the case you willdo, freestream conditions are as follows .Total pressure, pt_ = 482.7 lb/ft2 (23112 N/m2)Total temperature, Tt_ = 468°R (260 K)Mach number, M,,, = 1The surface will be slightly cooled so that surface temperature is 95% ofthe adiabatic-wall temperature .Your goal is to initiate the computation at a plate-length Reynoldsnumber, Re .,, of one million and determine the point where the momentumthicknessReynolds number, Reg, is 6000 . You might want to do this, forexample, in order to provide upstream profiles for a Navier-Stokes computation. You know from a correlation of experimental data that whenRe ., = 1 .0 - 10 6 , the boundary layer has the following integral properties :Skin friction, cf .0038Shape factor, H 1 .80B.L . Thickness, 6 11.90Reynolds number, Reg 1500Finally, the surface is perfectly smooth, there is no surface mass transfer,and the k-w model will be used .D.5 .1 Preliminary OperationsTo perform this exercise, delete any existing eddybl.dat data file thatmight be in your directory. Although this is not generally necessary, forthe purposes of this section it will be easier if you begin with the defaultvalues .As with the bench-mark case of Section D.2, the very first step is torun Program SETEBL . If you have not installed the program, you will benotified with a brief message after which the program will immediately terminate. If this happens, go back to Section D.3 and perform the installationprocedure .Assuming the program is properly installed, you will see a messageinforming you that file eddybl.dat does not exist . You will be asked if youwant to create a new file named eddybl.dat . For this sample session, youshould answer yes by typing the letter Y followed by pressing the ENTERkey .