Modelling a tracer injection and sensor manifold

Abstract

Results of the simulations showed that the conductivity sensor has a high pressure drop due to different cross sectional areas in some parts; the main effects are due to the rozita and cone part. Hence, there is a need for an improvement of either the rozita and cone parts or design completely a new sensor. Evolution and distribution of the tracer cloud passing through the sensor is affected by the shape and size of the injection tube and the tracer flow direction. The 90 degree bent cylinder with needle shape at one end of the injector gives unexpected result, as the tracer cloud is formed at the top of the pipe and not as expected at the bottom. This result also contradicts result from previous work of Oscar Pujol, which gives a tracer cloud formation at the center of the pipe near the tip of the injector for the same injector design. The second injector design gives a good mixing and distribution of the tracer. Based on the simulation I recommended to adding a mixer after the injector and before the sensor inlet in order to improve the mixing and distribution of the tracer concentration.