Correlation between wall temperature and flow field of an impinging chevron jet

InfraRed thermography and Time Resolved Tomographic Particle Image Velocimetry techniques are simultaneously applied to investigate the correlation between heat transport and momentum of a circular and a chevron continuous jet impinging on a flat plate in water. The two different jets configurations are investigated at fixed Reynolds number and nozzle-to-plate distance. Mean and turbulent fluctuation distributions of temperature at impinging surface and of velocity close to the wall are presented overlapped on the same frame. The simultaneous measurements revealed that the local enhancement of the mixing happens along the apices of the chevron nozzle which are characterised by larger velocity fluctuations.