Thesis topic proposal
Miklós Balogh
Numerical Simulation of Stratified Atmospheric Boundary Layers


Institute: Budapest University of Technology and Economics
mechanical engineering
Géza Pattantyús-Ábrahám Doctoral School of Mechanical Engineering

Thesis supervisor: Miklós Balogh
Location of studies (in Hungarian): BME Department of Fluid Mechanics
Abbreviation of location of studies: ÁT

Description of the research topic:

a.) Antecedents: There is an increasing demand for the numerical simulation of atmospheric boundary layer in engineering practice, since its results can be used for the better utilization of wind energy and the enhancement of air quality, furthermore this is the cheapest option for structural wind load analysis. Several studies are dealing with the simulation of the atmospheric boundary layer, but there are only a few, where the effects of the thermal stratification is taken into account. Thus, the comprehensive analysis of arbitrarily stratified boundary layers is still challenging, since the required physical parameterization schemes for micro-scale phenomena are thinly available.

b.) Aim of research: The aim of this research is to develop the required physical parameterization schemes and the methodology of the simulations at micro-scale, namely to substantiate the background of the comprehensive analysis.

c.) Tasks, main items, necessary time:
• Literature survey, 1 semester.
• Implementation of a model able to handle arbitrarily stratified boundary layers, 1 semester.
• Validation of the model, 1 semester.
• Development and implementation of required parametrization schemes, 2 semester.
• Validation of the simulation framework developed in this manner, 1 semester.
• Continuous publication activity, writing the thesis, additional 2 semester.

d.) Required equipment: Computer cluster, workstation computers.

e.) Expected scientific results: The research facilitate the comprehensive numerical analysis of the arbitrarily stratified atmospheric boundary layer, by means of a new model, physical parameterizations and the micro-scale simulation methodology.

f.) References:
• M. Balogh, A. Parente. Realistic boundary conditions for the simulation of atmospheric boundary layer flows using an improved k–ε model. JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS 144: pp. 183-190. (2015)
• M. Balogh, A. Parente, C. Benocci, RANS simulation of ABL flow over complex terrains applying an Enhanced k-ε model and wall function formulation: Implementation and comparison for Fluent and OpenFOAM. JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS 104-106:(SI) pp. 360-368. (2012)

Required language skills: english
Number of students who can be accepted: 1

Deadline for application: 2018-10-19

All rights reserved © 2007, Hungarian Doctoral Council. Doctoral Council registration number at commissioner for data protection: 02003/0001. Program version: 2.2358 ( 2017. X. 31. )