Now showing items 1-20 of 87

  • Airflow Measurement of the Car HVAC Unit Using Hot-wire Anemometry 

    Fojtlín, Miloš; Planka, Michal; Fišer, Jan; Pokorný, Jan; Jícha, Miroslav (EDP Sciences, 2016-03-28)
    Thermal environment in a vehicular cabin significantly influence drivers’ fatigue and passengers’ thermal comfort. This environment is traditionally managed by HVAC cabin system that distributes air and modifies its ...
  • Air–liquid interactions in a pressure-swirl spray 

    Jedelský, Jan; Malý, Milan; Del Corral, Noé Pinto; Wigley, Graham; Janáčková, Lada; Jícha, Miroslav (Elsevier, 2018-01-02)
    The energy transfer between a liquid hollow cone spray and the surrounding air has been studied using both imaging and phase-Doppler techniques. The spray was produced by a pressure-swirl atomizer discharging Jet A-1 fuel ...
  • Analysis of fiber deposition using automatic image processing method 

    Bělka, Miloslav; Lízal, František; Jedelský, Jan; Jícha, Miroslav (EDP Sciences, 2013-04-09)
    Fibers are permanent threat for a human health. They have an ability to penetrate deeper in the human lung, deposit there and cause health hazards, e.g. lung cancer. An experiment was carried out to gain more data about ...
  • Application of Positron Emission Tomography to Aerosol Transport Research in a Model of Human Lungs 

    Lízal, František; Jedelský, Jan; Adam, Jan; Bělka, Miloslav; Jícha, Miroslav (EDP Sciences, 2013-04-09)
    Positron Emission Tomography (PET) is a convenient method for measurement of aerosol deposition in complex models of lungs. It allows not only the evaluation of regional deposition characteristics but also precisely detects ...
  • Applications of the discontinuous Galerkin method to propagating acoustic wave problems 

    Nytra, Jan; Čermák, Libor; Jícha, Miroslav (SAGE Publishing, 2017-06-16)
    The purpose of this article is to demonstrate that the discontinuous Galerkin method is efficient and suitable to solve linearized Euler equations, modelling sound propagation phenomena.
  • Assesment of the Thermal Environment in Vehicular Cabins 

    Fojtlín, Miloš
    Ľudia žijúci vo vyspelých krajinách trávia väčšinu svojho života vo vnútorných prostrediach budov alebo dopravných prostriedkov. Z tohto dôvodu, záujem o výskum kvality vnútorných prostredím rastie, pričom hlavný dôraz je ...
  • Calibration of the Heat Balance Model for Prediction of Car Climate 

    Pokorný, Jan; Fišer, Jan; Jícha, Miroslav (EDP Sciences, 2012-04-16)
    In the paper, the authors refer to development a heat balance model to predict car climate and power heat load. Model is developed in Modelica language using Dymola as interpreter. It is a dynamical system, which describes ...
  • Calibration of Virtual Testing Stand of the Car Cabin using climatic chamber tests 

    Pokorný, Jan; Fišer, Jan; Jícha, Miroslav (EDP Sciences, 2015-05-06)
    The aim of our research is to calibrate and verify of the software Virtual Testing Stand of the Car Cabin using climatic chamber tests. The Virtual Testing Stand is standalone executable software developed in Matlab for ...
  • Characteristics of droplet motion in effervescent sprays 

    Jedelský, Jan; Zaremba, Matouš; Malý, Milan; Jícha, Miroslav (EDP Sciences, 2014-03-25)
    Time resolved droplet size and velocity measurement was made using Phase-Doppler anemometry in an effervescent spray at GLR of 6 % and operation pressure drops 21 – 52 kPa. The spray shows a size dependent variation of ...
  • Characteristics of Turbulent Particle Transport in Human Airways under Steady and Cyclic Flows 

    Jedelský, Jan; Lízal, František; Jícha, Miroslav (Elsevier, 2012-06-15)
    Motion of monodispersed micron-sized particles suspended in air flow was studied on transparent model of human airways using Phase-Doppler Particle Analyser (P/DPA). Time-resolved velocity data for particles in size range ...
  • Comparison of CFD simulations and measurements of flow affected by coanda effect 

    Fišer, Jan; Jedelský, Jan; Vach, Tomáš; Forman, Matěj; Jícha, Miroslav (EDP Sciences, 2012-04-16)
    The article deals with experimental research and numerical simulations of specific phenomena in fluid flows called Coanda effect (CE), which has numerous important engineering applications. Although many researchers have ...
  • Comparison of different configurations of Phase Doppler Analyser 

    Zaremba, Matouš; Malý, Milan; Jedelský, Jan; Jícha, Miroslav (EDP Sciences, 2016-03-28)
    A phase Doppler anemometry (PDA) technique is widely used in experimental fluid mechanics to measure size and velocity of particles in the fluid flow. Even though this method is common in experimental fluid mechanics, there ...
  • Comparison of methods for evaluation of aerosol deposition in the model of human lungs 

    Bělka, Miloslav; Lippay, Josef; Lízal, František; Jedelský, Jan; Jícha, Miroslav (EDP Sciences, 2014-03-25)
    It seems to be very convenient to receive a medicine by inhalation instead of injection. Unfortunately transport of particles and targeted delivery of a drug in human respiratory airways is very complicated task. Therefore ...
  • Comparison of methods for flow border detection in images of smoke visualization 

    Caletka, Petr; Pech, Ondřej; Jedelský, Jan; Lízal, František; Jícha, Miroslav (EDP Sciences, 2016-03-28)
    A separation of the flow region from the surroundings is an essential step in the analysis of smoke visualization images. The separation can be performed using several detection methods from the image segmentation group. ...
  • Comparison of turbulent models in the case of a constricted tube 

    Elcner, Jakub; Lízal, František; Jícha, Miroslav (EDP Sciences, 2016-11-15)
    The validation of a proper solution is an indispensable phase of every numerical simulation. Nowadays, many turbulent models are available, whose application leads to slightly different solution of flow behaviour depending ...
  • Comparison of two inlet boundary approaches in numerical simulation of car ventilation outlet flow 

    Talanda, Tomáš; Niedoba, Pavel; Lízal, František; Jícha, Miroslav (EDP Sciences, 2015-11-17)
    The paper is concerned with the comparison of two inlet boundary approaches of numerical simulations. The first approach is based on the simulation of a sufficiently long duct upstream the area of interest with known ...
  • Comparison of Y-jet and OIL effervescent atomizers based on internal and external two-phase flow characteristics 

    Mlkvik, Marek; Zaremba, Matouš; Jedelský, Jan; Jícha, Miroslav (EDP sciences, 2016-03-28)
    Presented paper focuses on spraying of two viscous liquids ( = 60 and 143 mPa·s) by two types of twinfluid atomizers with internal mixing. We compared the well-known Y-jet atomizer with the less known, “outside in liquid” ...
  • Condenser-type Heat Exchanger for Compost Heat Recovery Systems 

    Bajko, Jaroslav; Fišer, Jan; Jícha, Miroslav (MDPI, 2019-04-25)
    The majority of heat released during composting is contained in latent form of water vapour. To improve the rate of heat recovery, a simple heat exchanger based on condensation of compost vapours was designed. A prototype ...
  • Coupling of the Models of Human Physiology and Thermal Comfort 

    Pokorný, Jan; Jícha, Miroslav (EDP Sciences, 2013-04-09)
    A coupled model of human physiology and thermal comfort was developed in Dymola/Modelica. A coupling combines a modified Tanabe model of human physiology and thermal comfort model developed by Zhang. The Coupled model ...
  • Determination of car seat contact area for personalised thermal sensation modelling 

    Fojtlín, Miloš; Psikuta, Agnieszka; Toma, Róbert; Fišer, Jan; Jícha, Miroslav (PLOS, 2018-12-11)
    A lot of daily activities are conducted in a sedentary posture. This includes a thermal interaction between the human and the seat that has implications on thermal perception and comfort. These interactions are investigated ...