Computation studies of air flow in two dimensional coaxial pipe

The present study conducted a computer simulation of a turbulent flow in a two co-axial pipes with varying pipe diameter and entrance displacement (ΔL). The entrained flow characteristics together with the effect of the temperature of the entrance flow inlet were studied with variation of ΔL. The numerical method employs differencing scheme for integrating the continuity equation and energy equation. An equation k-ε turbulent model was used to simulate the turbulent transport quantities. A Fluent CFD modeling package was used to produce 2-D predictions of the flow pattern. Results show that increasing the air entrained temperature until 600 K will decrease the air flow rate and the diameter ratio of 2.81 has the highest entrained flowrate.