Initial condition of fluid within domain
 

Hi, i am new to CFD as well as Fluent. I have created a 2D model to simulate natural convection within a vertical channel. Within the channel, I have a wall emiting constant heat flux, a pressure inlet at the bottom of the channel and a pressure outlet at the top of the channel, pressure of this 2 channels are at atmospheric pressure (101325 pascal) and temperature of 293K.

How do i go about setting the pressure of fluid within the channel plate to be at atmospheric pressure and the temperature to be 293K initially?

Kindly assist and thank you.