[IEEE 2020 19th IEEE Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems (ITherm) - Orlando, FL, USA (2020.7.21-2020.7.23)] 2020 19th IEEE Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems (ITherm) - Theoretical Investigation of Boundary Layer Behavior and Heat Transfer of Supercritical Carbon Dioxide (sCO 2 ) in a Microchannel