This example illustrates how an ".iptime" file can be created from published data. The former is an input to CM to define time dependent variables. e.g. time dependent non-standard boundary conditions. In this example we consider aortic pressure variation at the proximal end of the aorta wrt time. This pressure variation is cyclic with an approximate period of 0.87 seconds or the frequency of about 69 cycles per minute (human heart beat rate). A plot of published data (Smith, N.P, PhD thesis, UoA, 1999, pp. 195) is used. Initially we create a scan image of this plot and save as, say , 'pressure_cycle.jpg'. The time axis of the plot varies from 0 - 2 seconds (2 units) while the pressure axis varies from 9 - 15 kPa (6 units). Leave sufficient margins around the plot, 0.5 units on both sides of the time axis and 1 unit on both sides of the pressure axis. This gives us 3 units horizontally and 8 units vertically. When scanning stick to these boundaries.
Time variation of Aortic Pressure