He started not with blocks, but with a notepad. He wrote the overall mass balance first. Then the energy balance. He explained the —why you can't specify everything, only enough to close the system.
The Convergence Point
Chloe leaned forward, her nose almost touching the screen. "Why didn't it converge?" aspen plus tutorial
He hit the button. The status bar churned. Red text flashed: ERROR. COLUMN NOT CONVERGED. SPECIFICATIONS INCONSISTENT. He started not with blocks, but with a notepad