抄録
We measured jet thrust and pressure drop in water flowing through micro-orifices. It was found that the measured jet thrust and pressure drop agreed with the prediction by Navir-Stokes equation for the orifices more than 100micron meter diameter. However, they were lower than the prediction for the orifices less than 50micron meter diameter. As a results, possibility of normal stress in elongatinal flow has been strongly suggested.
