Hello, it seems like it can not be changed directly but it could be done using UDFs, not sure though. You can get the sample UDF code if you search it on the internet. Below is the link of a section of the Ansys Fluent User Guide where you can find the steps for setting Turbulent Dispersion Force using various models.
https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v222/en/flu_ug/flu_ug_sec_mphase_using_steps_eulerian.html%23flu_ug_sec_euler_using_turbdisp
You are navigating away from the AIS Discovery experience