# Viscosity/time

**URL:** <https://gromacs.bioexcel.eu/t/viscosity-time/1994>\
**Category:** User discussions\
**Created:** [April 19, 2021, 11:39pm UTC](https://gromacs.bioexcel.eu/t/viscosity-time/1994 "2021-04-19T23:39:35Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![MOH4](https://avatars.discourse-cdn.com/v4/letter/m/a87d85/32.png) [@MOH4](https://gromacs.bioexcel.eu/u/MOH4)\
**Post date:** [April 19, 2021, 11:39pm UTC](https://gromacs.bioexcel.eu/t/viscosity-time/1994/1 "2021-04-19T23:39:35Z")

</div>

Dear all,

Is there any command to calculate and plot viscosity vurses time directly?  
I would like to know if Gromac can measure changes in viscoity upon denaturation and unfolding.  
If there is, I apperciate your kindness sending me the exact command.

Many thanks in advance  
Best

---

<div class="post-metadata">

**Author:** ![alevilla](https://dub1.discourse-cdn.com/flex017/user_avatar/gromacs.bioexcel.eu/alevilla/32/439_2.png) [@alevilla](https://gromacs.bioexcel.eu/u/alevilla)\
**Post date:** [April 21, 2021, 7:58am UTC](https://gromacs.bioexcel.eu/t/viscosity-time/1994/2 "2021-04-21T07:58:42Z")

</div>

Hi,

I do not know details on how is normally calculated protein denaturation viscosity, but liquid viscosity can be evaluated using gromacs tools (see details on the formula here [Viscosity calculation — GROMACS 2021.1 documentation](https://manual.gromacs.org/current/reference-manual/special/viscosity-calculation.html?highlight=viscosity))

Best regards  
Alessandra