@inproceedings{MTMT:24542578, title = {Wind tunnel investigations of pollution dispersion in a scale model of a large area of the city. Geneva: WIT Transactions on Ecology and the Environment}, url = {https://m2.mtmt.hu/api/publication/24542578}, author = {D, Greco and P, Pontelandolfo and T, Nour and R, Putzu}, booktitle = {Air Pollution XXII}, doi = {10.2495/AIR140181}, publisher = {WIT Press}, unique-id = {24542578}, year = {2014}, pages = {213-215} } @article{MTMT:2644657, title = {Adaptation of Pressure Based CFD Solvers for Mesoscale Atmospheric Problems}, url = {https://m2.mtmt.hu/api/publication/2644657}, author = {Kristóf, Gergely and Rácz, Norbert and Balogh, Miklós}, doi = {10.1007/s10546-008-9325-7}, journal-iso = {BOUND-LAY METEOROL}, journal = {BOUNDARY-LAYER METEOROLOGY}, volume = {131}, unique-id = {2644657}, issn = {0006-8314}, abstract = {General purpose Computational Fluid Dynamics (CFD) solvers are frequently used in small-scale urban pollution dispersion simulations without a large extent of ver- tical flow. Vertical flow, however, plays an important role in the formation of local breezes, such as urban heat island induced breezes that have great significance in the ventilation of large cities. The effects of atmospheric stratification, anelasticity and Coriolis force must be taken into account in such simulations. We introduce a general method for adapting pressure based CFD solvers to atmospheric flow simulations in order to take advantage of their high flexibility in geometrical modelling and meshing. Compressibility and thermal stratification effects are taken into account by utilizing a novel system of transformations of the field variables and by adding consequential source terms to the model equations of incompressible flow. Phenomena involving mesoscale to microscale coupled effects can be analyzed without model nesting, applying only local grid refinement of an arbitrary level. Elements of the method are validated against an analytical solution, results of a reference calculation, and a laboratory scale urban heat island circulation experiment. The new approach can be applied with benefits to several areas of application. Inclusion of the moisture transport phenomena and the surface energy balance are important further steps towards the practical application of the method.}, keywords = {MODEL; TRANSFORMATION; CONVECTION; Computational fluid dynamics; URBAN HEAT-ISLAND; Dispersion of pollutants; Mesoscale flows}, year = {2009}, eissn = {1573-1472}, pages = {85-103}, orcid-numbers = {Kristóf, Gergely/0000-0001-7572-6875} } @article{MTMT:2646046, title = {Légszennyező anyagok terjedése városokban - A magas épületek hatása a légszennyezettségre}, url = {https://m2.mtmt.hu/api/publication/2646046}, author = {Lajos, Tamás and Goricsán, István and Régert, Tamás and Suda, Jenő Miklós and Balczó, Márton}, journal-iso = {MAGYAR ÉPÍTŐIPAR}, journal = {MAGYAR ÉPÍTŐIPAR}, volume = {2008}, unique-id = {2646046}, issn = {0025-0074}, abstract = {One of the most significant objectives of air pollution control is the reduction of concentration of traffic related pollutants in cities. These pollutants travel with air, so their dispersion depends basically on the characteristics of atmospheric flow field under urban canopy, influenced by buildings and vegetation. This study gives a short overview on building related flow structures influencing mainly the transport of pollutants then it describes the various mechanisms of the dispersion of pollutants in urban environment. One of the mechanisms significant from the point of view of air pollution control is the downflow close to the upstream front elevation of high buildings transporting clean air to pedestrian level. More significant is the effect of separation bubble developing over the downstream front elevation, lifting up the polluted air from the pedestrian level and transporting it in higher layers of atmosphere. The methods of investigation used in fluid mechanics: wind tunnel experiments and numerical simulation of flows are suitable not only for determination of wind forces but also for prediction of effect of buildings on air pollution and pedestrian wind comfort.}, year = {2008}, pages = {137-144}, orcid-numbers = {Suda, Jenő Miklós/0000-0003-1460-0405; Balczó, Márton/0000-0002-1273-3047} } @article{MTMT:23992385, title = {Városok légszennyezettségének, valamint épületek és szerkezetek szélterhelésének meghatározása szélcsatorna-vizsgálattal és az áramlás numerikus szimulációjával}, url = {https://m2.mtmt.hu/api/publication/23992385}, author = {Lajos, Tamás and Goricsán, István and Lohász, Máté Márton and Régert, Tamás and Balczó, Márton}, journal-iso = {GÉP}, journal = {GÉP}, volume = {2005}, unique-id = {23992385}, issn = {0016-8572}, year = {2005}, pages = {3-8} } @CONFERENCE{MTMT:23992384, title = {Comparison of wind tunnel measurement and numerical simulation of dispersion of pollutants in urban environment}, url = {https://m2.mtmt.hu/api/publication/23992384}, author = {Goricsán, István and Balczó, Márton and Régert, Tamás and Suda, Jenő Miklós}, booktitle = {Int. Conf. Urban Wind Engineering and Buildings Aerodynamics Impact of Wind and Storm on City Life and Built Environment}, publisher = {Von Karman Institute for Fluid Dynamics}, unique-id = {23992384}, year = {2004}, pages = {D6-1-D6-10} }