Below are the finalist photo entries of the fifth UK Fluids Network photo and video competition with theme 'Instability' - click here to vote for the finalist videos.
How to vote:
- Review the photos by clicking on them to enlarge them.
- Once you have chosen the best photo, click on the "Vote" button next to it
- Enter your email address and confirm your vote
N.B. Only one vote is accepted in each category.