Radiation-transfer modelling of double-pass saturated ASE systems

2002 ◽  
Author(s):  
B. Rus
Keyword(s):  
Radiation Transfer ◽  
Double Pass ◽  
Transfer Modelling

scholarly journals Introduction of Fractal-Based Tree Digitalization and Accurate In-Canopy Radiation Transfer Modelling to the Microclimate Model ENVI-met

Forests ◽  
2020 ◽  
Vol 11 (8) ◽  
pp. 869
Author(s):  
Helge Simon ◽  
Tim Sinsel ◽  
Michael Bruse
Keyword(s):  
Radiation Transfer ◽  
Numerical Models ◽  
Diffuse Radiation ◽  
Secondary Sources ◽  
Plant Canopies ◽  
Wall Structures ◽  
Transfer Modelling ◽  
Branching System ◽  
Lindenmayer System ◽  
Radiation Extinction

While complex urban morphologies including different materials, wall structures, etc., are rather adequately represented in microclimate models, replication of actual plant geometry is—so far—rather crudely handled. However, plant geometry greatly differs within species and locations while strongly determining a plant’s microclimate performance. To improve the plants representation in numerical models, a new method to describe plant skeletons using the so-called Lindenmayer-System has been implemented in the microclimate model ENVI-met. The new model allows describing much more realistic plants including the position and alignment of leaf clusters, a hierarchical description of the branching system and the calculation of the plant’s biomechanics. Additionally, a new canopy radiation transfer module is introduced that allows not only the simulation of diffuse radiation extinction but also secondary sources of diffuse radiation due to scattering of direct radiation within plant canopies. Intercomparisons between model runs with and without the advancements showed large differences for various plant parameters due to the introduction of the Lindenmayer-System and the advanced radiation scheme. The combination of the two developments represents a sophisticated approach to accurately digitize plants, model radiative transfer in crown canopies, and thus achieve more realistic microclimate results.

Radiation transfer modelling of the dust torus of phobos in view of the Mars mission

1995 ◽  
Vol 43 (10-11) ◽  
pp. 1479-1483 ◽  
Author(s):  
A. Jurewicz ◽  
V. Orofino ◽  
A. Blanco ◽  
S. Fonti
Keyword(s):  
Radiation Transfer ◽  
Mars Mission ◽  
Transfer Modelling

Simple Expression for the Emittance of H2O-CO2 Mixtures in Zonal Methods of Radiation Transfer Modelling

2013 ◽  
Author(s):  
German Malikov ◽  
Alexandr Titaev ◽  
Vladimir Lisienko ◽  
Raymond Viskanta
Keyword(s):  
Radiation Transfer ◽  
Wide Band ◽  
Gas Mixtures ◽  
Simple Expression ◽  
Computational Time ◽  
Band Model ◽  
Combustion Gas ◽  
Transfer Modelling ◽  
Wide Band Model ◽  
Total Emittance

A new and simple expression for the calculation of the total gas emittance of H2O-CO2 mixtures for modeling radiation transfer in combustion furnaces is presented. Its accuracy is established by comparing the predictions with those based on the well established exponential wide band model. The computational time was found to be reduced by a factor of 10–30 in comparison to other methods for computing the total emittance of combustion gas mixtures.

scholarly journals 3D Monte Carlo radiation transfer modelling of photodynamic therapy

2015 ◽  
Author(s):  
C. Louise Campbell ◽  
Craig Christison ◽  
C. Tom A. Brown ◽  
Kenneth Wood ◽  
Ronan M. Valentine ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Photodynamic Therapy ◽  
Radiation Transfer ◽  
Transfer Modelling ◽  
3D Monte Carlo

PERFORMANCE ANALYSIS OF DOUBLE PASS COUNTER FLOW SOLAR AIR HEATER FOR DRYING APPLICATION

2018 ◽  
Author(s):  
D.V.N. Lakshmi ◽  
Palanisamy Muthukumar ◽  
Dr.Apurba Layek ◽  
Abhimanyu Kumar Singh ◽  
Sushoban Das
Keyword(s):  
Performance Analysis ◽  
Solar Air Heater ◽  
Double Pass ◽  
Counter Flow ◽  
Air Heater
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