Solving Turbulent Flow Dynamics of Complex, Multiple Branch Radon Mitigation Systems

ABSTRACT Active radon mitigation systems with a large flexibility in their complexity are simulated via computer calculations assuming incompressible gas flow dynamics. When designing more complex, multiple branch systems, insight into the turbulent flow dynamics inside the systems vent pipes may be of advantage in design and optimization of pipe sizing and radon ventilator characteristics. I will show how their effects can be simulated and assessed during the installation of real systems. For an N-branch, active, non-looped, radon mitigation system I will show how to construct the complete set of non-linear equations with its independent variables and demonstrate how these can be uniquely solved and applied to optimize a system under design. A number of real systems were used to compare with calculations. I will show a number of applications using this program: 1) The effects of sub-slab material and its resistance on the system. 2) The effects of turbulent flow through vent pipes of various diameters. 3) The effects of varying ventilator characteristics. 4) Calculations of multiple pipe branches in real time.