抄録
To propose an effective method of jet mixing in low Reynolds number, two and four inclined multiple jets are examined using Direct Numerical Simulation (DNS). The spatial descritization is performed by hybrid scheme, in which sixth order compact scheme in streamwise direction and fourier series in cross section are adopted. In case of two jets, large-scale vortex structures which are the shape of concentric circle formed around collision point and then break down at downstream. However, in case of four jets, large-scale vortex structures does not formed, a large number of minute vortex occure. From the mixing property which was estimated by using entropy analysis, we found that two jets was more mixed than single jet or four jets.
