THE TRANSIENT TEMPERATURE PREDICTION IN THE DEEPWATER RISERLESS WELL

2021 ◽  
pp. 1-15
Author(s):  
Ming Feng ◽  
Catalin Teodoriu ◽  
Jerome J. Schubert
Keyword(s):  
Temperature Distribution ◽  
Transient Temperature ◽  
Transfer Model ◽  
Temperature Prediction ◽  
Thermal Problem ◽  
Well Integrity ◽  
Operational Safety ◽  
Control Volumes ◽  
Transient Thermal ◽  
And Control

Abstract The purpose of study is to analyze the transient thermal problem of the circulation fluids in the riserless well, which is critical to well integrity, and thus to operational safety of the well. The transient heat transfer model is based on the theory of the energy balance and control volumes to solve the downhole circulation fluids temperature distribution in a riserless well. Examples demonstrate the calculated circulation fluids temperature distribution in the wellbore by using this model.

scholarly journals Comparison of temperature distributions in road pavement obtained in field tests and using transient thermal analysis

2019 ◽  
Vol 262 ◽  
pp. 05007 ◽  
Author(s):  
Jarosław Górszczyk ◽  
Konrad Malicki
Keyword(s):  
Heat Transfer ◽  
Temperature Distribution ◽  
Field Tests ◽  
Field Measurements ◽  
Mechanical Analysis ◽  
Transfer Model ◽  
Road Pavement ◽  
Temperature Distributions ◽  
Pavement Structure ◽  
Transient Thermal

The paper presents the results of comparative analyzes of temperature distributions in the pavement structure. The distributions were determined in field measurements and transient thermal analysis.The phenomenon of thermal conduction in a road pavement is described by the Fourier-Kirchhoff heat transfer equation. The temperature distribution was analyzed at several depths of the pavement structure. The results of calculations are presented in the form of temperature profiles and graphs of temperature variability. The heat transfer model applied in the qualitative aspect correctly shows the heat transfer in the pavement structure, however in quantitative terms it requires calibration to local climatic and material conditions. Knowledge of the temperature distribution in the pavement is very important for the design and mechanical analysis of pavement structure.

A Study on Heat Transfer Model in Wood Particle during the Pyrolysis

2011 ◽  
Vol 704-705 ◽  
pp. 462-467
Author(s):  
Liang Jing Jing ◽  
Rui Li ◽  
Yu Yu Li
Keyword(s):  
Heat Transfer ◽  
Temperature Distribution ◽  
Thermal Behavior ◽  
Thermophysical Properties ◽  
Fast Pyrolysis ◽  
Wood Particle ◽  
Heat Transfer Model ◽  
Transient Temperature ◽  
Transfer Model ◽  
Optimization Of Parameters

Heat transfer in wood particle controls the process of the pyrolysis. This paper makes a 2-D transient heat transfer model in cylindrical to predict the thermal behavior of wood particle in the process of fast pyrolysis. Wood anisotropy and thermophysical properties are considered in this model, as well as the influence of heat reaction on temperature distribution in wood particle. Based on the calculation of transient temperature in wood particle, and analysis of the temperature distribution during the process of wood fast pyrolysis at different time, this paper preliminarily discusses the optimization of parameters in wood particle fast pyrolysis. Keywords: pyrolysis, heat transfer, particle, wood

Transient Thermal Stresses in a Circular Cylinder

1961 ◽  
Vol 28 (1) ◽  
pp. 25-34 ◽  
Author(s):  
C. K. Youngdahl ◽  
Eli Sternberg
Keyword(s):  
Exact Solution ◽  
Temperature Distribution ◽  
Cross Sections ◽  
Thermal Stresses ◽  
Transient Temperature ◽  
Definite Integrals ◽  
Transient Temperature Distribution ◽  
Transient Thermal ◽  
Finite Band ◽  
Uniform Change

This paper contains an exact solution for the transient temperature distribution, as well as for the accompanying quasi-static thermal stresses and deformations, which arise in an infinitely long elastic circular shaft if its surface temperature undergoes a sudden uniform change over a finite band between two cross sections and is steadily maintained thereafter. The solution given is in the form of definite integrals and infinite series, whose convergence is discussed. Extensive illustrative numerical results are included.

A photothermoelastic investigation of transient thermal stresses in wing ribs

1972 ◽  
Vol 7 (2) ◽  
pp. 117-124 ◽  
Author(s):  
E Matsumoto ◽  
S Sumi ◽  
T Sekiya
Keyword(s):  
Temperature Distribution ◽  
Thermal Stresses ◽  
Three Dimensional ◽  
Composite Model ◽  
New Technique ◽  
Transient Temperature ◽  
Transient Temperature Distribution ◽  
Transient Thermal

The photothermoelastic method of refrigeration has been used to study the problem of a long beam under transient temperature distribution and good correlation with the theoretical values has been obtained. The new technique for three-dimensional photothermoelasticity, which uses a composite model made of photoelastically sensitive and insensitive materials, is suggested for the analysis of idealized wing-rib structures.

Boundary Condition Design to Heat a Moving Object at Uniform Transient Temperature Using Inverse Formulation

2004 ◽  
Vol 126 (3) ◽  
pp. 619-626 ◽  
Author(s):  
Hakan Ertu¨rk ◽  
Ofodike A. Ezekoye ◽  
John R. Howell
Keyword(s):  
Boundary Condition ◽  
Temperature Distribution ◽  
Design Problem ◽  
Manufacturing Industry ◽  
Three Dimensional ◽  
Chemical Deposition ◽  
Iterative Solution ◽  
Conveyor Belt ◽  
Temperature History ◽  
Transient Temperature

The boundary condition design of a three-dimensional furnace that heats an object moving along a conveyor belt of an assembly line is considered. A furnace of this type can be used by the manufacturing industry for applications such as industrial baking, curing of paint, annealing or manufacturing through chemical deposition. The object that is to be heated moves along the furnace as it is heated following a specified temperature history. The spatial temperature distribution on the object is kept isothermal through the whole process. The temperature distribution of the heaters of the furnace should be changed as the object moves so that the specified temperature history can be satisfied. The design problem is transient where a series of inverse problems are solved. The process furnace considered is in the shape of a rectangular tunnel where the heaters are located on the top and the design object moves along the bottom. The inverse design approach is used for the solution, which is advantageous over a traditional trial-and-error solution where an iterative solution is required for every position as the object moves. The inverse formulation of the design problem is ill-posed and involves a set of Fredholm equations of the first kind. The use of advanced solvers that are able to regularize the resulting system is essential. These include the conjugate gradient method, the truncated singular value decomposition or Tikhonov regularization, rather than an ordinary solver, like Gauss-Seidel or Gauss elimination.

scholarly journals Understanding the thermal problem of variable gradient functionally graded plate based on hybrid numerical method under linear heat source

2021 ◽  
Vol 13 (5) ◽  
pp. 168781402110178
Author(s):  
Jianhui Tian ◽  
Guoquan Jing ◽  
Xingben Han ◽  
Guangchu Hu ◽  
Shilin Huo
Keyword(s):  
Heat Conduction ◽  
Temperature Distribution ◽  
Heat Source ◽  
Numerical Method ◽  
Functionally Graded ◽  
Thermal Problem ◽  
Linear Heat ◽  
Hybrid Numerical Method ◽  
Linear Heat Source ◽  
Gradient Parameter

The thermal problem of functionally graded materials (FGM) under linear heat source is studied by a hybrid numerical method. The accuracy of the analytical method and the efficiency of the finite element method are taken into account. The volume fraction of FGM in the thickness direction can be changed by changing the gradient parameters. Based on the weighted residual method, the heat conduction equation under the third boundary condition is established. The temperature distribution of FGM under the action of linear heat source is obtained by Fourier transform. The results show that the closer to the heat source it is, the greater the influence of the heat source is and the influence of the heat source is local. The temperature change trend of the observation points is consistent with the heat source, showing a linear change. The results also show that the higher the value of gradient parameter is, the higher the temperature of location point is. The temperature distribution of observation points is positively correlated with gradient parameter. When the gradient parameter value exceeds a certain value, it has a little effect on the temperature change in the model and the heat conduction in the model tends to be pure metal heat conduction, the optimal gradient parameters combined the thermal insulation property of ceramics and the high strength toughness of metals are obtained.

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