Laser-Doppler Velocimetry and Computational Fluid Dynamics

Laser-Doppler Velocimetry and Computational Fluid Dynamics 

To compare the hydrodynamic behavior of supercritical CO2 and water, laser-Doppler velocimetry (LDV) measurements have been performed in a specially designed high-pressure mixing vessel provided with glass windows. For the same geometry. Computational Fluid Dynamics (CFD) calculations have been made for both media. 

The stainless steel high-pressure vessel used for the flow measurements, designed by ITTB Heerenveen (The Netherlands), is presented in Fig. 3.2. The vessel has an internal diameter of 6 cm and is designed for pressures up to 15 MPa. The temperature is controlled by pumping water from a thermostatic bath through channels in the vessel wall. Pitched-blade impellers with a diameter of half the vessel diameter are used to stir the vessel content. Two glass windows allow for measurement of velocity components in three directions with laser-Doppler velocimetry. The LDV equipment consists of a 2D fiber optics system 

---

Tools like laser Doppler velocimetry and computational fluid dynamics along with process testing are useful for analyzing mixing reqnirements. 

---