# Cathal Cummins:

Applied Mathematician

**Your name?**

Cathal Cummins

**Your job title?**

Applied Mathematician

**Where?**

UCD

**What type of maths do you use in your job?**

My work concerns the motions of uids so I mainly use Calculus. Some of the equations that I end up with can run on for a long time, so I need to use Algebra to simplify them so that they can t on a page sometimes! Because I need to calculate distances, I use quite a bit of Co ordinate Geometry too.

**Where did you study?**

BSc Mathematical Physics (UCD),

MSc Mathematical Modelling (UL),

PhD in Applied Mathematics (UL)

**How you use maths in your everyday job?**

I look at how fluids flow in all sorts of different ways: from bouncing rain-drops on your car windscreen to sinking bubbles in a pint of Guinness. The simple part is writing down the equations that describe the fluid motion: the

hard part is figuring out how to solve them. Each problem requires a different mathematical technique to solve it, and choosing the right technique can be the most challenging part at times.

**What advice would you give to those whom are studying maths?**

Mathematics is the glue that sticks so many scientific disciplines together;the skills that you’ll gain through studying it will stand to you no matter where you go. Don’t be afraid to ask questions if something doesn’t make sense to

you!