  We describe our first attempt to systematically simulate the solar wind
during different phases of the last solar cycle with the Alfv\'en Wave Solar
atmosphere Model (AWSoM) developed at the University of Michigan. Key to this
study is the determination of the optimal values of one of the most important
input parameters of the model, the Poynting flux parameter, which prescribes
the energy flux passing through the chromospheric boundary of the model in the
form of Alfv\'en wave turbulence. It is found that the optimal value of the
Poynting flux parameter is correlated with the area of the open magnetic field
regions with the Spearman's correlation coefficient of 0.96 and anti-correlated
with the average unsigned radial component of the magnetic field with the
Spearman's correlation coefficient of -0.91. Moreover, the Poynting flux in the
open field regions is approximately constant in the last solar cycle, which
needs to be validated with observations and can shed light on how Alfv\'en wave
turbulence accelerates the solar wind during different phases of the solar
cycle. Our results can also be used to set the Poynting flux parameter for
real-time solar wind simulations with AWSoM.
