# prescribing the motion of a solid sphere

**URL:** https://discourse.paraview.org/t/prescribing-the-motion-of-a-solid-sphere/14188
**Category:** ParaView Support
**Tags:** vtk
**Created:** [March 18, 2024, 10:58am UTC](https://discourse.paraview.org/t/prescribing-the-motion-of-a-solid-sphere/14188 "2024-03-18T10:58:02Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![asujrpv](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/a/7c8e57/32.png) [@asujrpv](https://discourse.paraview.org/u/asujrpv)
#### Post date: [March 18, 2024, 10:58am UTC](https://discourse.paraview.org/t/prescribing-the-motion-of-a-solid-sphere/14188/1 "2024-03-18T10:58:02Z")

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I have a rotating flow on cylindrical coordinates but the image is projected onto 2d cross section. The body (a sphere) is moving up and down in a sinusoidal manner and the flow is rotating, thus producing some rays as shown in the image. How can I create a movie where I have 100 vtk files and I want the sphere to oscillate up and down in a manner that I prescribe?

 ![image](https://discourse.paraview.org/uploads/default/original/2X/4/4cef4bbccde1ee1d15c1254ece3b05eaeb9011b5.jpeg)