Job Somhorst on An album of computational fluid motion https://album-of-cfm.com/authors/jobsomhorst/ Recent content in Job Somhorst on An album of computational fluid motion Hugo -- gohugo.io en Fri, 18 Aug 2023 00:00:00 +0000 Fig 24. Circular cylinder at R=1.54 https://album-of-cfm.com/chapters/02-laminar/fig24/ Fri, 18 Aug 2023 00:00:00 +0000 https://album-of-cfm.com/chapters/02-laminar/fig24/ ExperimentSimulation “At this Reynolds number the streamline pattern has clearly lost the fore-and-aft symmetry of figure 6. However, the flow has not yet separated at the rear. That begins at about R=5, though the value is not known accurately. Fig 40. Circular cylinder at R=9.6 https://album-of-cfm.com/chapters/03-separation/fig40/ Fri, 18 Aug 2023 00:00:00 +0000 https://album-of-cfm.com/chapters/03-separation/fig40/ ExperimentSimulation “Here, in contrast to figure 24, the flow has clearly separated to form a pair of recirculating eddies. The cylinder is moving through a tank of water containing aluminum powder, and is illuminated by a sheet of light below the tree surface. Fig 41. Circular cylinder at R=13.1 https://album-of-cfm.com/chapters/03-separation/fig41/ Fri, 18 Aug 2023 00:00:00 +0000 https://album-of-cfm.com/chapters/03-separation/fig41/ ExperimentSimulation “The standing eddies become elongated in the flow direction as the speed increases. Their length is found to increase linearly with Reynolds number until the flow becomes unstable above R=40. Fig 42. Circular cylinder at R=26 https://album-of-cfm.com/chapters/03-separation/fig42/ Fri, 18 Aug 2023 00:00:00 +0000 https://album-of-cfm.com/chapters/03-separation/fig42/ ExperimentSimulation “The downstream distance to the cores of the eddies also increases linearly with Reynolds number. However, the lateral distance between the cores appears to grow more nearly as the square root. Fig 45. Circular cylinder at R=28.4 https://album-of-cfm.com/chapters/03-separation/fig45/ Fri, 18 Aug 2023 00:00:00 +0000 https://album-of-cfm.com/chapters/03-separation/fig45/ ExperimentSimulation “Here just the boundary of the recirculating region has been made visible by coating the cylinder with condensed milk and setting it in motion through water.” Photograph by Sadathoshi Taneda Fig 46. Circular cylinder at R=41 https://album-of-cfm.com/chapters/03-separation/fig46/ Fri, 18 Aug 2023 00:00:00 +0000 https://album-of-cfm.com/chapters/03-separation/fig46/ ExperimentSimulation “This is the approximate upper limit for steady flow. Far downstream the wake has already begun to oscillate sinusoidally. Tiny irregular gathers are appearing on the boundary of the recirculating region, but dying out as they reach its downstream end. Fig 94. Kármán vortex street behind a circular cylinder at R=140 https://album-of-cfm.com/chapters/04-vortices/fig94/ Fri, 18 Aug 2023 00:00:00 +0000 https://album-of-cfm.com/chapters/04-vortices/fig94/ ExperimentSimulation “Water is flowing at 1.4 cm/s past a cylinder of diameter 1cm. Integrated streamlines are shown by electrolytic precipitation of white colloidal smoke, illuminated by a sheet of light. Fig 96. Kármán vortex street behind a circular cylinder at R=105 https://album-of-cfm.com/chapters/04-vortices/fig96/ Fri, 18 Aug 2023 00:00:00 +0000 https://album-of-cfm.com/chapters/04-vortices/fig96/ ExperimentSimulation “The initially spreading wake shown opposite develops into the two parallel rows of staggered vortices that von Kármàn’s inviscid theory shows to be stable when the ratio of width to streamwise spacing is 0.