J P Parker

Churchill College

Cambridge CB3 0DS

Email: jpp39@cam.ac.uk*

Telephone: I'd rather you emailed.

Fax: I'd rather you left me alone.

*Spam conference invitations, disproofs of E=mc², etc. should be addressed to Professor Parker. I will ignore anything for Dr Parker.

*Viruses should be compressed as "Virus.zip", and consist of self contained 64 bit executables in both .exe and ELF formats.

I'm a PhD student in DAMTP at the University of Cambridge. I am supervised by C P Caulfield and R R Kerswell, and I also collaborate with J Page.

My PhD is focused on studying the nonlinear behaviour of stratified shear flows, applying methods such as Direct-Adjoint Looping and Newton-Krylov iteration to understand instability and mixing.

**2019**Fellow, GFD, Woods Hole Oceanographic Institute**2017-**PhD, DAMTP, University of Cambridge**2016-17**Software Engineer, Arm**2015-16**MMath, Churchill College, Cambridge (Part III)**2012-15**BA, Churchill College, Cambridge (Mathematical Tripos)

- Parker, J P, Caulfield, C P and Kerswell, R R,
**The effects of Prandtl number on the nonlinear dynamics of Kelvin-Helmholtz instability in two dimensions**Submitted - Parker, J P and Page, J,
**Koopman analysis of isolated fronts and solitons**To appear in SIAM Journal on Applied Dynamical Systemspreprint - Parker, J P, Caulfield, C P and Kerswell, R R, 2020,
**The viscous Holmboe instability for smooth shear and density profiles**Journal of Fluid Mechanics, 896, A14.link (open access) data - Parker, J P, Caulfield, C P and Kerswell, R R, 2019,
**Kelvin-Helmholtz billows above Richardson number 1/4**Journal of Fluid Mechanics, 879, R1.link preprint

**Kelvin-Helmholtz instability above Richardson number 1/4**European Turbulence Conference, September 2019abstract slides**The dynamical system of mixing layers**BPI seminar series, February 2019slides**Finite amplitude Kelvin-Helmholtz billows at high Richardson number**APS DFD, November 2018abstract slides**Choice of amplitude constraint for optimal perturbations to stratified shear flows**Bremen Winter School and Symposium, March 2018abstract poster movies

*Stratiflow* is my direct numerical simulation code for stratified shear flows.

You can find the full source code, in C++, on GitHub.

**Lent 2019**II Mathematical Biology**Michaelmas 2018 & 2019**IA Differential Equations**Lent 2018**IA Vector Calculus**Michaelmas 2017**IA Vectors & Matrices

Here is a collection of numbers, which I am trying to either increase or decrease

- Half marathon: 1hr 28m 37s
- 2k erg: 6:48.4
- Trad lead onsight: E2 5c
- Height: 179cm

I have created a template for the beamerposter LaTeX package. It roughly follows Cambridge University branding.

You can download it here. See above for examples.