Fluid Mechanics

Marc Olle Bernades


marc.bernades@upc.edu

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PhD Candidate - Supercritical Turbulence

Former F1 Engineer

I am a senior PhD candidate in the Department of Fluid Mechanics at Polytechnical University of Catalonia - BarcelonaTech working with Professor Lluís Jofre Cruanyes . My PhD research is on supercritical miniaturization of wall-bounded turbulence and is conducted within an ERC Starting Grant 2021 funded project (European Council Research ERC-2021-STG 101040379 - SCRAMBLE) Turbulence-On-a-Chip: Supercritically Overcoming the Energy Frontier in Microfluidics. In this regard, the objectives are twofold, (i)  the design and investigation numerical methods for high-pressure turbulence and computational framework for compressible flow and (ii) the characterization of wall-bounded transcritical turbulent flow physics, linear stability and adaptive resolvent analysis and large-eddy simulation a-priori analysis for high-pressure turbulence.

Personal Bio

A highly motivated, conscientious and dedicated Mechanical Engineer with a passion for learning. This passion took me to pursue a PhD that will offer early responsibility and career progression where I can utilise my skills, education and work experience. In fact, I took this decision to also broaden my skills within the fluid mechanics, aerodynamics and aerospace field, after over 10 years of experience as vehicle dynamics and performance engineer in the automotive and motorsport industry. In particular, these years of experience were useful to improve work effectiveness as a team player or on own initiative with the drive to succeed in a demanding environment through the use of self-learning. To this extent, this is currently helping me towards the execution of the challenging high-standing PhD. I define myself also as a very ambitious individual who aims to achieve their potential in all aspects and tasks undertaken both professionally and personally.

DNS streamwise velocity countourplot (YZ plane)

Research interests

Publications

Peer-Reviewed Journal Articles

Conference Papers

Conferences and Seminars

Conferences

Seminars

Show Cases 

Thermodynamics Supercritical Microfluidics Turbulence

Bulk Reynolds numbers with Dh = 200 μm and ub = 2 m/s for Nitrogen

Compressible factor (Z) with Dh = 200 μm and ub = 2 m/s for Nitrogen

Kinetic-Energy- & Pressure-Equilibrium-Preserving Scheme

Pressure-equilibrium preservation performance under 1D Advective test for multiple convective schemes

1D advection test under transcritical thermodynamic conditions, at t/tc = 10−2, for several schemes (novel scheme stated as KGP-Pt) - Normalized density.

1D advection test under transcritical thermodynamic conditions, at t/tc = 10−2, for several schemes (novel scheme stated as KGP-Pt) - Normalized pressure.


2D inviscid transcritical mixing layer with novel KEP & PEP scheme for transcritical turbulent flows 

Normalized density with respect to critical point at t/tc = 2 with 256 × 128 mesh size and CFL= 0.3

Normalized heat capacity at constant pressur with respect to critical point at t/tc = 2 with 256 × 128 mesh size and CFL= 0.3


DNS Wall-Bounded Transcritical Turbulence

High- (left) vs. Low-pressure (right) snapshots of instantaneous streamwise velocity on YZ plane

Streamwise velocity (top) and Prandtl number (bottom) snapshots for high-pressure case

Evolution of (a) ensemble-averaged second invariant (QA⁺) and (b) Favre-averaged flow stresses on the barycentric map along the wall-normal direction

Q-criterion normalized density to critical point

Cold/bottom wall

Hot/Top wall