Flow over rough surfaces, and conjugate heat transfer, in engineering applications
Doktorsavhandling, 2018

This thesis focuses on two important topics in the field of fluid mechanics and heat transfer that were treated separately. On the one hand, the flow over rough surfaces, which is not yet completely understood, despite of the fact that it has an important implication in many engineering applications, especially in the naval industry for ships and boats because the friction drag caused by fouling, antifouling coatings and roughness in general impacts the fuel consumption and toxic emissions to the atmosphere. In this thesis, new ways to measure and predict the friction drag of rough surfaces are presented, using both numerical simulations and experimental techniques.

On the other hand, conjugate heat transfer processes are also important in many applications, but a very relevant one is the electric generators for hydropower, since there is a current need of increasing the efficiency of these machines, which depends a lot on how they are cooled and therefore, on the rate at which the heat that is generated during their operation is dissipated (transferred to the cooling fluid). In this thesis, an experimental method for studying the heat transfer in these machines is presented and validated. Also, new correlations to improve the design phase of the electric generators are also evaluated.

Ship Hull

electric generator



convective heat transfer

Rotating Disk

Naphthalene Sublimation Tecnhique

Roughness Function

Skin-Friction Drag

stator channel

Antifouling paint


Impinging Jet

HC3, lecture hall
Opponent: Prof. Nikil Kapur, University of Leeds


Bercelay Niebles Atencio

Chalmers, Mekanik och maritima vetenskaper, Strömningslära

Submicron Resolution Long-Distance Micro-PIV Measurements in a Rough-Wall Boundary Layer

The 18th International Symposia on Applications of Laser Techniques to Fluid Mechanics,; (2016)

Paper i proceeding



Teknisk mekanik


Marin teknik



Doktorsavhandlingar vid Chalmers tekniska högskola. Ny serie: 4519


Chalmers tekniska högskola

HC3, lecture hall

Opponent: Prof. Nikil Kapur, University of Leeds

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