scholarly journals A modelling assessment of hydrocarbons (HC) and oxides of nitrogen (NOx) from transport sectors over Delhi

MAUSAM ◽  
2021 ◽  
Vol 49 (2) ◽  
pp. 177-182
Author(s):  
P. GOYAL ◽  
T.V.B.P.S. RAMA KRISHNA
Keyword(s):  
Error Analysis ◽  
Line Source ◽  
Statistical Error ◽  
Source Model ◽  
Oxides Of Nitrogen ◽  
Transportation Sector ◽  
Line Source Model ◽  
Better Than ◽  
No Emissions

Two models IT Line Source Model (IITLS) and H1WAY-2 model have been used to estimate the concentrations of the hydrocarbons (HC) and oxides of nitrogen (NOx) due to transportation sector. An elaborate source inventory for the extrapolation of the HC and NO. emissions by vehicular transport has been developed in IITLS model. The model's predicted concentrations have been compared with the observed values at three receptors namely, Mool Chand, Ashram and AIIMS in Delhi. A statistical error analysis of the model's results and observed values has been made for evaluating the model 's performance. In the present study, it has been observed that IITLS model performs better than HIWAY-2 model.

Finite line-source model for borehole heat exchangers: effect of vertical temperature variations

Geothermics ◽  
2009 ◽  
Vol 38 (2) ◽  
pp. 263-270 ◽  
Author(s):  
Tatyana V. Bandos ◽  
Álvaro Montero ◽  
Esther Fernández ◽  
Juan Luis G. Santander ◽  
José María Isidro ◽  
...  
Keyword(s):  
Heat Exchangers ◽  
Line Source ◽  
Source Model ◽  
Vertical Temperature ◽  
Temperature Variations ◽  
Finite Line ◽  
Finite Line Source ◽  
Line Source Model ◽  
Borehole Heat Exchangers

An improved line source model for air pollutant dispersion from roadway traffic

2011 ◽  
Vol 45 (24) ◽  
pp. 4099-4107 ◽  
Author(s):  
Régis Briant ◽  
Irène Korsakissok ◽  
Christian Seigneur
Keyword(s):  
Line Source ◽  
Pollutant Dispersion ◽  
Source Model ◽  
Air Pollutant ◽  
Air Pollutant Dispersion ◽  
Line Source Model

Matched transmission-line source model

1997 ◽  
Vol 14 (2) ◽  
pp. 94-99 ◽  
Author(s):  
Gregory P. Junker ◽  
Allen W. Glisson ◽  
Ahmed A. Kishk
Keyword(s):  
Transmission Line ◽  
Line Source ◽  
Source Model ◽  
Line Source Model

Evaluation of vehicular pollution levels using line source model for hot spots in Muscat, Oman

2020 ◽  
Vol 27 (25) ◽  
pp. 31184-31201
Author(s):  
Patrick Amoatey ◽  
Hamid Omidvarborna ◽  
Mahad Said Baawain ◽  
Abdullah Al-Mamun
Keyword(s):  
Hot Spots ◽  
Line Source ◽  
Source Model ◽  
Vehicular Pollution ◽  
Pollution Levels ◽  
Line Source Model

A comparative seismic hazard study for Azerbaijan Province in Iran

1981 ◽  
Vol 71 (1) ◽  
pp. 335-362
Author(s):  
B. Rowshandel ◽  
S. Nemat-Nasser ◽  
R. B. Corotis
Keyword(s):  
Seismic Hazard ◽  
Point Source ◽  
Ground Motion ◽  
Line Source ◽  
Seismic Source ◽  
Source Model ◽  
Strike Slip ◽  
Area Source ◽  
Area Source Model ◽  
Line Source Model

abstract Different seismic source models are used to estimate regional seismic hazard. Commonly used point, line, and area seismic sources are considered in addition to a new method which is obtained by modifying the line source model to take into account the uncertainty associated with the exact location of the line (i.e., fault). The results are presented in terms of cumulative functions of peak ground acceleration for major sites in the Azerbaijan Province of northwest Iran. Iso-acceleration maps for two different return periods are also developed for each seismic source model and a comparison is made among the results of the models. The point source model is shown to be unrealistic when used to model large shocks (Ms > 6.5), which correspond to long ruptures. The model cannot incorporate the fault length, thus ignoring possible spatial migration of seismicity along the fault. In addition, the actual attenuation of ground motion departs considerably from that associated with point source assumption. The conventional line source model, while providing a good representation of vertical strike-slip faults, cannot accurately model the seismicity in other cases, such as reverse faults in general, and thrust (low angle reverse) faults in particular. Epicenters for these latter cases do not lie along a line, as they do in case of vertical strike-slip faults. The area source model is used for those cases where the distribution of earthquake epicenters in a region does not follow any identifiable geological fault pattern. The spatial migration of seismicity along an active fault during a given exposure time is of vital importance in seismic hazard analysis. An analysis based on an area source model corresponds to assuming this migration will be equal in all directions. The theory of plate tectonics, however, suggests an elongated narrow zone corresponding to each fault. A fault line model is developed which exhibits less sensitivity of near-field ground motion to precise fault location than the line source model. This model is referred to as the strip source model. According to this model, the seismicity on a fault is spatially distributed in a long and narrow zone along the margins of the corresponding plates or microplates, and decreases with distance from the fault on either side. It is believed that this kind of modeling closely represents the seismicity corresponding to interplate earthquakes, especially when the type of faulting is thrust. Uncertainties due to the location and orientation of faults will be considerable, particularly for the buried faults, and these uncertainties can be incorporated in the strip source model.

Thermal Radiation From Vertical Turbulent Jet Flame: Line Source Model

2015 ◽  
Vol 138 (4) ◽  
Author(s):  
Kuibin Zhou ◽  
Juncheng Jiang
Keyword(s):  
Heat Flux ◽  
Line Source ◽  
Radiant Heat ◽  
Source Model ◽  
Radiant Heat Flux ◽  
Emissive Power ◽  
Jet Flame ◽  
New Model ◽  
Flame Shape ◽  
Line Source Model

It is often reported that a jet fire occurs in industrial installations or in the transportation of hazardous materials and could amplify the scale of accident by imposing lots of heat on people and nearby facilities. This paper presents a new semi-empirical radiation model, namely, the line source model to predict the radiant heat flux distribution around a vertical turbulent hydrocarbon jet flame. In terms of the fact that the jet flame holds the large ratio of flame length to diameter, the new model assumes that all thermal energy is emitted by a line source located inside the jet flame volume. With three typically different shapes to simulate the jet flame shape, a formula is proposed to characterize the profile of the emissive power per line length (EPPLL), by which the line source model can be closed in theory. In comparison with the point source model, the multipoint source model, and the solid flame model, the new model agrees better with the measurement of the heat flux radiated from a small jet flame. It is found that the line source model can well predict the radiant heat flux of both small and large jet flames, yet with the flame shape simulated by the back-to-back cone and the cone–cylinder combined shape, respectively. By parameter sensitivity and uncertainty analysis, the ranking by importance of input parameters is also given for the new model.

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