TABLE OF CONTENTS In App. 5C, a Fortran 90 code, called IP1D.F90, has been written to apply Fan's IP, Sun's IP, and a conventional DSMC method to Couette flows in a monatomic gas. The geometry is one-dimensional with a unit depth in the z-direction and two plane, diffusively reflecting walls that are normal to the x-axis. When compiling, there are two options to choose the different IP techniques, macro "IPFAN" for Fan's IP and macro "IPSUN" for Sun's IP. The conventional DSMC method is used if neither option is selected. Again, the IP technique does not affect the DSMC solution. IP1D.F90 becomes a DSMC solver when the lines inside the IP macros are removed.
In the implementation, the HS molecule model is used for the DSMC elastic binary collision process. In the gas-surface interaction, the Maxwellian diffuse reflection model is considered. In the calculation, this program employs normalized variables with length normalized by the mean free path in the initial gas ? 0 = 1/( 
? 2 n). A Knudsen number is defined as the ratio of ? 0 to the distance h between the lower and upper boundaries so that the distance is effectively the inverse Knudsen number of the flow. Temperature and density are normalized by their values in the initial gas. Velocity is normalized by 
. And the time step ? t is a value that factor, dtr, times the mean collision time of molecules...
