RESEARCH OF TEMPERATURE PROFILES IN THE WELL IN THE COURSE OF PUMPING LIQUID ON THE BASIS OF NUMERICAL INVERSION OF ISEGER

2017 ◽  
pp. 47-52
Author(s):  
A. I. Filippov ◽  
E. P. Shcheglova
Keyword(s):  
Temperature Profile ◽  
Integral Transformation ◽  
Numerical Inversion ◽  
Temperature Profiles ◽  
Short Term ◽  
Vertical Well ◽  
Numerical Transformation ◽  
Gaussian Quadratures ◽  
Inverse Transition

The analysis of a temperature profile in the trunk of a vertical well when pumping liquid was carried out. The paper describes the application of an algorithm of the inverse numerical transformation with use of Gaussian quadratures (Iseger's method) to a task about a temperature profile under conditions of a short-term liquid pumping into the well. Analytical dependences are constructed on the basis of a method of the Laplace-Carson integral transformation of decomposition. The inverse transition is carried out on the basis of numerical inversion with use of Gaussian quadratures (Iseger's method).

scholarly journals A new method to derive middle atmospheric temperature profiles using a combination of Rayleigh lidar and O<sub>2</sub> airglow temperatures measurements

2012 ◽  
Vol 30 (1) ◽  
pp. 27-32 ◽  
Author(s):  
A. Taori ◽  
A. Jayaraman ◽  
K. Raghunath ◽  
V. Kamalakar
Keyword(s):  
Temperature Profile ◽  
Atmospheric Temperature ◽  
New Method ◽  
Temperature Profiles ◽  
Vertical Temperature ◽  
Lidar System ◽  
Mesospheric Temperature ◽  
Simultaneous Measurements ◽  
Rayleigh Lidar ◽  
First Time

Abstract. The vertical temperature profiles in a typical Rayleigh lidar system depends on the backscatter photon counts and the CIRA-86 model inputs. For the first time, we show that, by making simultaneous measurements of Rayleigh lidar and upper mesospheric O2 temperatures, the lidar capability can be enhanced to obtain mesospheric temperature profile up to about 95 km altitudes. The obtained results are compared with instantaneous space-borne SABER measurements for a validation.

INFLUENCE OF CALORIMETRIC MIXING ON THE TEMPERATURE PROFILE WHEN EVALUATING WORKING INTERVALS

2021 ◽  
Author(s):  
Марат Финатович Закиров ◽  
Айрат Шайхуллинович Рамазанов ◽  
Рим Абдуллович Валиуллин ◽  
Рамиль Фаизырович Шарафутдинов
Keyword(s):  
Temperature Profile ◽  
Temperature Profiles ◽  
Measured Temperature ◽  
Vertical Wells

В данной работе исследуется профиль термограммы в зависимости от производительности работающих интервалов вертикальной скважины. Установлено, что существуют уникальные профили температур в зависимости от проявления эффекта калориметрического смешивания. Полученные результаты могут быть использованы для анализа экспериментальных профилей температуры с целью выделения работающих интервалов. In this paper, the thermogram profile is studied depending on the performance of the working intervals of the vertical wells. It is established that there are unique temperature profiles depending on the manifestation of calorimetric mixing. The obtained results can be used to analyze measured temperature profiles in order to identify working intervals.

Lattice Boltzmann modeling of convective flows in a large-scale cavity heated from below by two imposed temperature profiles

2019 ◽  
Vol 30 (5) ◽  
pp. 2759-2779
Author(s):  
Noureddine Abouricha ◽  
Mustapha El Alami ◽  
Khalid Souhar
Keyword(s):  
Nusselt Number ◽  
Temperature Profile ◽  
Lattice Boltzmann ◽  
Large Scale ◽  
Temperature Profiles ◽  
Control Parameters ◽  
Content Type ◽  
Convective Flows ◽  
Glass Door ◽  
Vertical Walls

Purpose The purpose of this paper is to model the convective flows in a room equipped by a glass door and a heated floor of length l = 0.8 × H and submitted to a sinusoidal temperature profile and mono alternative temperature profile. Design/methodology/approach The paper opts for a numerical study of convective flows in a large scale cavity using the Lattice Boltzmann Method (LBM) by considering a two dimensions (2D) square cavity of side H and filled by air (Pr = 0.71). All the vertical walls, the ceiling and the rest of the floor are thermally insulated, the hot portion of length l = 0.8×H is heated with two imposed temperature profiles of amplitude values 0.2 ≤  a  ≤ 0.6 and for two different periods ζ = ζ0 and ζ = 0.4×ζ0. One of the vertical walls has a cold portion θc = 0 that represents the glass door. Findings A systematic study of the flow structure and heat transfer is carried out considering principal control parameters: amplitude “a” and period ζ for Rayleigh number Ra = 108. Effects of these parameters on results are presented in terms of isotherms, streamlines, profiles of velocities, temperature in the cavity, global and local Nusselt number. It has been found that an increase in amplitude or period increases the amplitude of the temperature in the core of cavity. The Nusselt number increases when the amplitude “a” of the imposed temperature increases, but this later is not affected by variation of the period. Originality/value The authors used LBM to simulate the convective flows in a cavity at high Ra, heated from below by tow imposed temperature profiles. Indeed, they simulate a local equipped by a solar water heater (SWH). The floor is subjected to a periodic heating: Sinusoidal heating (Case 1) for which the temperature varies sinusoidally (SWH without a supplement), and mono alternation heating (Case 2), the temperature evolves like a redressed signal (SWH with a supplement). The considered method has been successfully validated and compared with the previous work. The study has been conducted using several control parameters such as the signal amplitude and period in the case of turbulent convection. This allowed us to obtain a considerable set of results that can be used for engineering.

Numerical Simulation of Temperature Profile in a Compartment Fire with a Roof Opening

2012 ◽  
Vol 538-541 ◽  
pp. 989-992 ◽  
Author(s):  
Jin Mei Li ◽  
Qiang Li ◽  
Yan Lei Dong ◽  
Chang Hai Li
Keyword(s):  
Numerical Simulation ◽  
Numerical Simulations ◽  
Temperature Profile ◽  
Source Size ◽  
Temperature Profiles ◽  
Compartment Fire ◽  
Gas Temperature ◽  
Fire Source ◽  
Smoke Layer ◽  
Cooling Function

Fifteen numerical simulations are presented in this article to investigate the influence of roof opening size and fire source size on gas temperature profiles in a compartment. The fire source size has a significant impact on the temperature hot smoke layer. The temperature of hot smoke layer increases as the increase of fire source size. The roof opening has cooling function to gas temperature in the compartment especially for large roof opening. The temperatures of hot smoke layer decrease with the roof opening size increase in all cases.

scholarly journals Impacts of snow and organic soils parameterization on North-Eurasian soil temperature profiles simulated by the ISBA land surface model

2015 ◽  
Vol 9 (6) ◽  
pp. 6733-6790
Author(s):  
B. Decharme ◽  
E. Brun ◽  
A. Boone ◽  
C. Delire ◽  
P. Le Moigne ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Soil Temperature ◽  
Soil Properties ◽  
Temperature Profile ◽  
Land Surface ◽  
Snow Depth ◽  
Land Surface Model ◽  
Surface Model ◽  
Temperature Profiles

Abstract. In this study we analysed how an improved representation of snowpack processes and soil properties in the multi-layer snow and soil schemes of the ISBA land surface model impacts the simulation of soil temperature profiles over North-Eurasian regions. For this purpose, we refine ISBA's snow layering algorithm and propose a parameterization of snow albedo and snow compaction/densification adapted from the detailed Crocus snowpack model. We also include a dependency on soil organic carbon content for ISBA's hydraulic and thermal soil properties. First, changes in the snowpack parameterization are evaluated against snow depth, snow water equivalent, surface albedo, and soil temperature at a 10 cm depth observed at the Col de Porte field site in the French Alps. Next, the new model version including all of the changes is used over Northern-Eurasia to evaluate the model's ability to simulate the snow depth, the soil temperature profile and the permafrost characteristics. The results confirm that an adequate simulation of snow layering and snow compaction/densification significantly impacts the snowpack characteristics and the soil temperature profile during winter, while the impact of the more accurate snow albedo computation is dominant during the spring. In summer, the accounting for the effect of soil organic carbon on hydraulic and thermal soil properties improves the simulation of the soil temperature profile. Finally, the results confirm that this last process strongly influences the simulation of the permafrost active layer thickness and its spatial distribution.

scholarly journals The effect of cloud liquid water on tropospheric temperature retrievals from microwave measurements

2017 ◽  
Author(s):  
Leonie Bernet ◽  
Francisco Navas-Guzmàn ◽  
Niklaus Kämpfer
Keyword(s):  
Temperature Profile ◽  
Liquid Water ◽  
Cloud Model ◽  
Cloud Base ◽  
Spectral Information ◽  
High Temporal Resolution ◽  
Temperature Profiles ◽  
Tropospheric Temperature ◽  
Cloud Liquid Water ◽  
Cloud Models

Abstract. Microwave radiometry is a suitable technique to measure atmospheric temperature profiles with high temporal resolution during clear sky and cloudy conditions. In this study, we included cloud models in the inversion algorithm of the microwave radiometer TEMPERA (TEMPErature RAdiometer) to determine the effect of cloud liquid water on the temperature retrievals. The cloud models were built based on measurements of cloud base altitude and integrated liquid water (ILW), all performed at the aerological station (MeteoSwiss) in Payerne (Switzerland). Cloud base altitudes were detected using ceilometer measurements while the ILW was measured by a HATPRO (Humidity And Temperature PROfiler) radiometer. To assess the quality of the TEMPERA retrieval when clouds were considered, the resulting temperature profiles were compared to two years of radiosonde measurements. The TEMPERA instrument measures radiation at 12 channels in the frequency range from 51 to 57 GHz, corresponding to the left wing of the oxygen emission line complex. When the full spectral information with all the 12 frequency channels was used, we found a marked improvement in the temperature retrievals after including a cloud model. The chosen cloud model influenced the resulting temperature profile, especially for high clouds and clouds with a large amount of liquid water. Using all 12 channels however presented large deviations between different cases, suggesting that additional uncertainties exist in the lower, more transparent channels. Using less spectral information with the higher, more opaque channels only also improved the temperature profiles when clouds where included, but the influence of the chosen cloud model was less important. We conclude that tropospheric temperature profiles can be optimized by considering clouds in the microwave retrieval, and that the choice of the cloud model has a direct impact on the resulting temperature profile.

scholarly journals Thermal Effects of Crevassing on Steele Glacier, Yukon Territory, Canada

1974 ◽  
Vol 13 (68) ◽  
pp. 243-254 ◽  
Author(s):  
Gary T. Jarvis ◽  
Garry K. C. Clarke
Keyword(s):  
Temperature Profile ◽  
Thermal Effects ◽  
Yukon Territory ◽  
Temperature Measurements ◽  
Temperature Profiles ◽  
Two Dimensional ◽  
Dimensional Model ◽  
Two Dimensional Model ◽  
Made In

Ice temperature measurements have been made in Steele Glacier to a depth of 114 m. All measured temperatures were below 0° C, the coldest being –6.5° C at a depth of 114 m. The temperature profile indicates an anomalously warm layer of ice between 30 m and 50 m, which is probably due to the freezing of water in crevasses opened during the 1965–66 surge. A two-dimensional model of a cold glacier with partially water-filled crevasses predicts temperature profiles very similar to that observed.

scholarly journals SuperModel predictions in the outskirts of the galaxy cluster Zwicky 3146

2020 ◽  
Vol 494 (1) ◽  
pp. 1250-1256
Author(s):  
Roberto Fusco-Femiano
Keyword(s):  
Temperature Profile ◽  
Density Profile ◽  
Previous Analysis ◽  
Galaxy Cluster ◽  
Temperature Profiles ◽  
Pressure Data ◽  
Thermal Pressure ◽  
Gas Density ◽  
X Ray ◽  
The Galaxy

ABSTRACT The relaxed galaxy cluster Zwicky 3146 is analysed via the SuperModel, a tool already tested on many clusters since 2009. In particular, this analysis is focused on the intracluster medium X-ray temperature data measured by XMM–Newton up to r500. A previous analysis was based on the temperature profile derived from the Sunyaev-Zeld′ovich effect pressure data. The gas mass fraction fgas is obtained from the resulting SuperModel temperature profile extrapolated up to the virial radius R, which turns out in agreement with the steep temperature profiles observed by Suzaku, and from the gas density profile observed by XMM–Newton. The comparison between fgas with the universal value indicates a non-thermal pressure component, pnth, in the cluster outskirts. The SuperModel analysis shows a ratio α(R) (${\simeq}50{{\ \rm per\ cent}}$) of pnth to the total pressure greater than the values found by simulations, highlighting the possible presence of accreting substructures and inhomogeneities in the gas density profile. Once that this profile is corrected for clumpiness, the level of pnth is considerably reduced. However, a significant turbulence ($\alpha (R)\simeq 20{{\ \rm per\ cent}}$) and entropy flattening are still present in the outskirts of the galaxy cluster Zwicky 3146.

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