Drag decreasing with decrease in temperature- Keeping Re and Mach same. why??? -- CFD Online Discussion Forums

June 26, 2021, 23:30	Drag decreasing with decrease in temperature- Keeping Re and Mach same. why???	#1
Usman Shahid New Member Usman Shahid Join Date: Dec 2020 Posts: 4 Rep Power: 5	Dear all, I am working on the validation of my cfd (using openFOAM) results on NACA0012. Experimental results are available at 0.3 Mach with 3.5 million Reynolds number. I am matching finding the properties of air by matching the Mach and Reynolds number by using expressions of Re, Ma, equation of state, and Sutherland's equation. For a particular temperature, I can find remaining properties of air such that Re, and Mach remains same. Now, if I decrease temperature, the values of Cd are decreasing. I am unable to understand that why is it so. CFD runs details: Mesh count: 83k (structured) Turb-Model: kw-SST Y+ : < 0.1 Convergence criteria: 10e-7 Kindly guide me in this regard, Thanks, Regards,

Posting Rules
You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is Off Trackbacks are Off Pingbacks are On Refbacks are On Forum Rules

All times are GMT -4. The time now is 22:33.