# Fluid volume acceleration in simscale

**URL:** <https://www.simscale.com/forum/t/fluid-volume-acceleration-in-simscale/101108>\
**Category:** Fluid Flow / CFD\
**Created:** [June 4, 2026, 5:29pm UTC](https://www.simscale.com/forum/t/fluid-volume-acceleration-in-simscale/101108 "2026-06-04T17:29:47Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![aupe8373](https://www.simscale.com/forum/letter_avatar/aupe8373/32/6_22734026db12803ebb3e059622ac3534.png) [@aupe8373](https://www.simscale.com/forum/u/aupe8373)\
**Post date:** [June 4, 2026, 5:29pm UTC](https://www.simscale.com/forum/t/fluid-volume-acceleration-in-simscale/101108/1 "2026-06-04T17:29:48Z")

</div>

I want to measure the fluid shear stresses experienced in a small enclosed volume of fluid when it experiences a sudden stop after travelling at a velocity. I am modeling this with a cylindrical volume with fluid properties and I want it to experience an acceleration. Is this something that can be modeled in Simscale? the built-in AI tool was not very helpful with this. Thanks!

---

<div class="post-metadata">

**Author:** ![RicardoParis](https://www.simscale.com/forum/user_avatar/www.simscale.com/ricardoparis/32/30222_2.png) [@RicardoParis](https://www.simscale.com/forum/u/RicardoParis)\
**Post date:** [June 4, 2026, 6:32pm UTC](https://www.simscale.com/forum/t/fluid-volume-acceleration-in-simscale/101108/3 "2026-06-04T18:32:18Z")

</div>

Hi, that sounds like a scenario that could benefit from solid body motion: [https://www.simscale.com/docs/simulation-setup/advanced-concepts/solid-body-motions/](https://www.simscale.com/docs/simulation-setup/advanced-concepts/solid-body-motions/)

---

<div class="post-metadata">

**Author:** ![aupe8373](https://www.simscale.com/forum/letter_avatar/aupe8373/32/6_22734026db12803ebb3e059622ac3534.png) [@aupe8373](https://www.simscale.com/forum/u/aupe8373)\
**Post date:** [June 4, 2026, 7:00pm UTC](https://www.simscale.com/forum/t/fluid-volume-acceleration-in-simscale/101108/4 "2026-06-04T19:00:30Z")

</div>

Thanks for the quick response. It looks like solid body motions only allows velocities. I don’t think I could manipulate this to simulate an acceleration. Do you have any other ideas?

---

<div class="post-metadata">

**Author:** ![RicardoParis](https://www.simscale.com/forum/user_avatar/www.simscale.com/ricardoparis/32/30222_2.png) [@RicardoParis](https://www.simscale.com/forum/u/RicardoParis)\
**Post date:** [June 4, 2026, 7:04pm UTC](https://www.simscale.com/forum/t/fluid-volume-acceleration-in-simscale/101108/5 "2026-06-04T19:04:48Z")

</div>

Within solid body motions, one way to control acceleration is via a rotating motion having a “point on axis” very far away from the part (i.e. the part will rotate about a point so distant that the motion will be approximately linear). You can define a time-dependent rotational velocity, which allows you to control the acceleration.