Reports on Environmental Physics (Berichte zur Umweltphysik, BZU) is a series published by Janicke Consulting. The reports appear at irregular intervals and are provided free of charge on this website. The reports are also available online at the German National Library. All rights reserved by the publisher.
BZU 11
Effective conversion rates between NO and NO2
- Authors
- Ulf Janicke
- Series
- Reports on Environmental Physics, Number 11, Edition 1, November 2023
- Language
- German
This report describes the derivation of effective conversion rates between NO and NO2 based on reaction mechanisms of the standard VDI 3783 Part 19 (2017) and their application in the program system LASREA (particle model LASAT in combination with higher order reactions). The effective conversion rates (and their inverse, the effective conversion times) can be used in conventional dispersion models such as LASAT or AUSTAL. Categorized conversion times were derived, which depend only on the background concentration, the atmospheric stability and the time of day. They can therefore be specified as time series without additional required parameters, for example within the framework of the regulation TA Luft (2021). Comparisons were made with the conversion times according to the standard VDI 3782 Part 1 (2016) and validations were carried out for a complex emission system. The developed methods and models can also be used for more special problems. The work was funded by the research project FKZ 3719 51 203 0.
How to cite
Ulf Janicke: Effective conversion rates between NO and NO2. Reports on Environmental Physics, No. 11, Edition 1, 2023. ISSN 1439-8303. German National Library urn:nbn:de:101:1-2024010409000934506629.
BZU 10
Specification of the calculation of plume rise for stacks and cooling towers
- Authors
- Ulf Janicke
- Series
- Reports on Environmental Physics, Number 10, Edition 2, June 2019
- Language
- German
This report contains a specification of the calculation of plume rise for stacks and cooling towers. The specification is based on the three-dimensional, integral plume rise model for dry and wet plumes PLURIS, on additional studies described in Report on Environmental Physics No. 9, and on conventions. It can be used for example in the context of dispersion calculations with a particle model according to the standard VDI 3945 Part 3 (2000).
How to cite
Ulf Janicke: Specification of the calculation of plume rise for stacks and cooling towers. Reports on Environmental Physics, No. 10, Edition 2, 2019. ISSN 1439-8303. German National Library urn:nbn:de:101:1-2019062112293651013085.
BZU 9
Enhancement of selected methodical foundations for the calculation of stack height and dispersion according to TA Luft
- Authors
- Ulf Janicke, Lutz Janicke, Wolfgang Bächlin, Thomas Flassak, Wolfgang Theurer, Alfred Trukenmüller
- Series
- Reports on Environmental Physics, Number 9, Edition 1, April 2017
- Language
- German
This report quotes research that has been carried out 2015/2016 on behalf of the German Federal Environmental Agency (UBA) in the project
Enhancement of selected methodical foundations for the calculation of stack height and dispersion according to TA Luft (FKZ 3714 43 204 00) by the companies Ingenieurbüro Janicke, Ingenieurbüro Lohmeyer and Ingenieurbüro Theurer. It contains (Section 3.2.11.2) results of the supplementary research on the
Wind tunnel determination of an equivalent block height for numerical microscale modelling by Ingenieurbüro Theurer on behalf of the federal states Baden-Württemberg, Bayern, Berlin, Hessen, and Thüringen and a comparison (Section 2.5) of former and new stack heights carried out by Alfred Trukenmüller (UBA) in course of steering this research project.
Supplements
Wolfgang Theurer: Wind tunnel determination of an equivalent block height for numerical microscale modelling. (Language: German)
Bericht_Ersatzquader_20180524.pdf (1546 KB)
Wolfgang Theurer:Treatment of near-roof sources in the numerical modelling. (Language: German)
Bericht_Dachnahe_Quellen_20180524.pdf (1617 KB)
How to cite
Ulf Janicke, Lutz Janicke, Wolfgang Bächlin, Thomas Flassak, Wolfgang Theurer, Alfred Trukenmüller: Enhancement of selected methodical foundations for the calculation of stack height and dispersion according to TA Luft. Reports on Environmental Physics, No. 9, Edition 1, 2017. ISSN 1439-8303. German National Library urn:nbn:de:101:1-201709132627.
BZU 8
Accurate numerical solution and analytical approximation for the wind profile over flat terrain
- Authors
- Ulf Janicke, Lutz Janicke
- Series
- Reports on Environmental Physics, Number 8, Edition 2, April 2017
- Language
- English
An accurate numerical procedure for calculating the vertical profile of wind speed and wind direction over flat terrain for a given exchange coefficient profile is presented together with an analytical approximation. The profiles can be used in local wind or air quality studies over flat terrain. In contrast to simpler analytical profiles, the proposed profiles provide a consistent treatment of both wind speed and wind direction, as well close to the ground. In contrast to prognostic wind field models, the proposed methods demand considerably less computation power. However, they provide a smooth transition to the profiles resulting from prognostic wind field models in the limit of flat and homogeneous terrain.
How to cite
Ulf Janicke, Lutz Janicke: Accurate numerical solution and analytical approximation for the wind profile over flat terrain. Reports on Environmental Physics, No. 8, Edition 2, 2017. ISSN 1439-8303. German National Library urn:nbn:de:101:1-201709132645.
BZU 7
Some aspects of the definition of meteorological boundary layer profiles and comparisons with measurements
- Authors
- Ulf Janicke, Lutz Janicke
- Series
- Reports on Environmental Physics, Number 7, Edition 1, February 2011
- Language
- German
Meteorological boundary layer profiles, like the current standard profiles of the dispersion models LASAT and AUSTAL2000, are compared with measurements. Several aspects are discussed relevant for the setup of standard profiles, for example in connection with guideline VDI 3783 Part 8. The measurements have been evaluated and prepared as data sets by the University of Hamburg (group of Prof. B. Brümmer; Dr. G. Peters, I. Lange). The data (Excel files and report) are provided on the website www.janicke.de (
Download/Data sets).
How to cite
Ulf Janicke, Lutz Janicke: Some aspects of the definition of meteorological boundary layer profiles and comparisons with measurements. Reports on Environmental Physics, No. 7, Edition 1, 2011. ISSN 1439-8303. German National Library urn:nbn:de:101:1-201607204988.
BZU 6
Washout of SO2, NOX, and dust by rain: Model parameters for dispersion models of type VDI 3945 Part 3
- Authors
- Ulf Janicke, Lutz Janicke
- Series
- Reports on Environmental Physics, Number 6, Edition 1, April 2008
- Language
- German
In a Lagrangian dispersion model based on the standard VDI 3945 Part 3, ground uptake from dry and wet deposition is described using the parameters deposition velocity and washout rate. In this project, parameter values for SO2, NOX, and particulate matter are derived. The values for dry deposition are based on the standard VDI 3782 Part 5. To describe washout by rain, a combination of deposition velocity and washout rate is used, which approximately accounts for the complex effects of absorption, desorption, and chemical reactions within raindrops.
How to cite
Ulf Janicke, Lutz Janicke: Washout of SO2, NOX, and dust by rain: Model parameters for dispersion models of type VDI 3945 Part 3. Reports on Environmental Physics, No. 6, Edition 1, 2008. ISSN 1439-8303. German National Library urn:nbn:de:101:1-201607204968.
BZU 5
The development of the dispersion model AUSTAL2000G
- Authors
- Lutz Janicke, Ulf Janicke
- Series
- Reports on Environmental Physics, Number 5, Edition 2, March 2007
- Language
- German
The TA Luft regulates how the dispersion of pollutants in the atmosphere is to be calculated as part of permit procedures. This regulation has been implemented, for example, in the computer program AUSTAL2000 (Version 1.1). The federal states’ desire to use a model that was as similar as possible to calculate odor dispersion as well led to the project AUSTAL2000G. In a series of preliminary studies and subprojects, the implementation was carried out, resulting in version 2.0 of AUSTAL2000. It can be used both for TA Luft applications and for odor dispersion issues. This report summarizes the reports produced during the course of development by the subprojects.
How to cite
Lutz Janicke, Ulf Janicke: The development of the dispersion model AUSTAL2000G. Reports on Environmental Physics, No. 5, Edition 2, 2007. ISSN 1439-8303. German National Library urn:nbn:de:101:1-201607204988.
BZU 4
A note on the distribution function of density fluctuations in the model COFIN
- Authors
- Lutz Janicke
- Series
- Reports on Environmental Physics, Number 4, Edition 2, March 2006
- Language
- English
In the model COFIN, the density fluctuations in a plume are derived from LIDAR measurements. However, the distribution function given is neither normalized nor non-negative. It is shown how these deficiencies can be removed.
How to cite
Lutz Janicke: A note on the distribution function of density fluctuations in the model COFIN. Reports on Environmental Physics, No. 4, Edition 2, 2006. ISSN 1439-8303. German National Library urn:nbn:de:101:1-201607204997.
BZU 3
Washout of NH3: Determination of an effective washout rate
- Authors
- Ulf Janicke
- Series
- Reports on Environmental Physics, Number 3, Edition 1, November 2000
- Language
- German
This study examines the washout of atmospheric ammonia by rain, taking into account the simultaneous uptake of CO2. An effective washout rate for NH3 is derived, assuming that the ammonia cloud is described by a vertically homogeneous layer. The results are compared with experimental measurements. As an application, the mass input into the ground due to wet deposition is calculated for a specific accident scenario.
How to cite
Ulf Janicke: Washout of NH3: Determination of an effective washout rate. Reports on Environmental Physics, No. 3, Edition 1, 2000. ISSN 1439-8303. German National Library urn:nbn:de:101:1-201607205005.
BZU 2
A meteorological boundary layer model for Lagrangian dispersion models
- Authors
- Lutz Janicke, Ulf Janicke
- Series
- Reports on Environmental Physics, Number 2, Edition 1, October 2000
- Language
- German
Based on a comprehensive literature review, a meteorological boundary layer model is developed that can be used in dispersion calculations with Lagrangian models. The model is validated at hand of experiments.
How to cite
Lutz Janicke, Ulf Janicke: A meteorological boundary layer model for Lagrangian dispersion models. Reports on Environmental Physics, No. 2, Edition 1, 2000. ISSN 1439-8303. German National Library urn:nbn:de:101:1-201607205013.
BZU 1
A random walk model for turbulent diffusion
- Authors
- Lutz Janicke
- Series
- Reports on Environmental Physics, Number 1, Edition 1, August 2000
- Language
- English
An algorithm of a random walk model is presented that is not restricted to time steps small with respect to the smallest Lagrangian correlation time. The correct relation for the drift velocity under these circumstances is derived. The increased value of the time step makes it possible in many cases to perform the dispersion calculation within a shorter time or with higher accuracy. In addition, an empirical expression for the drift velocity is given that is also valid for a spatially varying time step. The algorithm described is implemented in the Lagrangian dispersion model LASAT.
How to cite
Lutz Janicke: A random walk model for turbulent diffusion. Reports on Environmental Physics, No. 1, Edition 1, 2000. ISSN 1439-8303. German National Library urn:nbn:de:101:1-2016070810514.
