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                           مکانیک:: 
                            ساختار گرداب
                        
                        Vortex structure behind a disk started from rest
In the case of wall jet, a double row vortex structure can be seen clearly (e.g.
This figure shows changes in vortex structure with increas- ing KR2/v for H/R=1.75 (upper row) and 2.5 (lower row).
 
                        
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