Results 31 to 40 of about 257,535 (310)

Refrigerant forced-convection condensation inside horizontal tubes [PDF]

open access: yes, 1968
High vapor velocity condensation inside a tube was studied theoretically. The heat transfer coefficients were calculated by the momentum and heat transfer analogy.
Bae, S.   +8 more
core   +1 more source

Nearly Free Molecular Heat Transfer from a Sphere [PDF]

open access: yes, 1968
Consider a sphere immersed in a rarefied monatomic gas with zero mean flow. The distribution function of the molecules at infinity is chosen to be a Maxwellian. The boundary condition at the body is diffuse reflection with perfect accommodation to the
Schmulian, Robert Jay
core   +1 more source

Numerical study on conjugate heat transfer in a liquid-metal-cooled pipe based on a four-equation turbulent heat transfer model

open access: yesNuclear Engineering and Technology, 2023
Conjugate heat transfer between liquid metal and solid is a common phenomenon in a liquid-metal-cooled fast reactor's fuel assembly and heat exchanger, dramatically affecting the reactor’s safety and economy.
Xian-Wen Li   +4 more
doaj   +1 more source

BOUNDARY CONTROL OF ROD TEMPERATURE FIELD WITH A SELECTED POINT

open access: yesВестник КазНУ. Серия математика, механика, информатика, 2022
In this paper, we study the issue of boundary control of the temperature field of a rod with a selected point. The main purpose of the work is to clarify the conditions for the existence of a boundary control that ensures the transition of the ...
K. B. Imanberdiyev   +3 more
doaj   +1 more source

Solitary-wave solutions of the Degasperis-Procesi equation by means of the homotopy analysis method [PDF]

open access: yes, 2010
The homotopy analysis method is applied to the Degasperis-Procesi equation in order to find analytic approximations to the known exact solitary-wave solutions for the solitary peakon wave and the family of solitary smooth-hump waves.
Abbasbandy, S., Parkes, E.J.
core   +1 more source

Optimal Control of Heat Equation by Coupling FVM and FEM Codes

open access: yesMathematics
In this paper, the optimal control theory is applied to a temperature optimization problem by coupling finite element and finite volume codes. The optimality system is split into the state and adjoint system.
Samuele Baldini   +5 more
doaj   +1 more source

Investigation into the heat transfer models for the hot crude oil transportation in a long‐buried pipeline

open access: yesEnergy Science & Engineering, 2023
Based on reasonable simplifications of a two‐dimensional (2D) energy equation, a basic heat transfer equation in 1D form is obtained for the hot crude oil transportation in a long‐buried pipeline.
Qing Yuan   +6 more
doaj   +1 more source

Temperature response functions (G-functions) for single pile heat exchangers [PDF]

open access: yes, 2013
Foundation piles used as heat exchangers as part of a ground energy system have the potential to reduce energy use and carbon dioxide emissions from new buildings. However, current design approaches for pile heat exchangers are based on methods developed
Loveridge, F.A.   +3 more
core   +1 more source

New Stable, Explicit, Shifted-Hopscotch Algorithms for the Heat Equation

open access: yesMathematical and Computational Applications, 2021
Our goal was to find more effective numerical algorithms to solve the heat or diffusion equation. We created new five-stage algorithms by shifting the time of the odd cells in the well-known odd-even hopscotch algorithm by a half time step and applied ...
Ádám Nagy   +4 more
doaj   +1 more source

Experimental determination of natural convection heat transfer coefficients in an attic shaped enclosure

open access: yes, 2010
Heat transfer by natural convection in triangular enclosures is an area of significant importance in applications such as the design of greenhouses, attics and solar water heaters.
Carson, James K.   +2 more
core   +1 more source

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