mathematical model for heat transfer limitations of heat pipe


Two-dimensional comprehensive mathematical model for

Jun 09,2020 mathematical model for heat transfer limitations of heat pipe#0183;Taking the electroslag remelting with pipe electrode (ESR-PE) and electroslag remelting with solid electrode (ESR-SE) as the research objects,a two-dimensional steady-state mathematical model of coupled electromagnetic field equation,energy equation,and flow equation was established.The distribution of its current density,Joule heat,flow field,and temperature field was compared andTransient Thermo-Fluid Modeling of Loop Heat Pipes and A transient mathematical model is developed to study the transient response and analyze the distribution of heat load in a loop heat pipe.The model is based on the one-dimensional and time-dependent conservation equations for heat and fluid flow.The momentum and energy conservation equations for each of the loop heat pipe components are solved.Thermal Characterization of a Heat Transport System for Keywords loop heat pipe,thermal characterization,mathematical model 1.Introduction Loop heat pipes (LHP) are common heat transfer devices used within the aerospace industry.Due to their capability of transferring heat over long distances and their excellent heat transfer performance LHPs are predestined for use in

Some results are removed in response to a notice of local law requirement.For more information,please see here.Previous123456Next(PDF) A Mathematical Model Predicting Heat Transfer

A mathematical model to predict the oscillating motion and heat transfer in a closed-loop oscillating heat pipe in the presence of a magnetic field is presented.Numerical Modeling of a Heat Pipe Transient ModesA transient one-dimensional mathematical model for a conventional heat pipe is presented and solved numerically.The model was developed using the energy conservation equation to simulate the temperature profile across the heat pipe shell,with source term account for

Most Downloaded Mathematical and Computer Modelling

The most downloaded articles from Mathematical and Computer Modelling in the last 90 days. Utilizing artificial neural networks and genetic algorithms to build an algo-trading model for intra-day foreign exchange speculation - Open Mathematical model for heat transfer limitations of heat pipe - Open archive.January 2013.Patrik Nemec Mathematical model for heat transfer limitations of heat pipe Mathematical Modeling,Numerical Simulation and mathematical model of heat pipes can be developed and simulated on computer.This computer model allows for the testing of many different possible factors that affects the heat pipes thermal resistance without the costly and time consuming process of manufacturing and lab testing.Each factor that might affect the thermal resistance was

Mathematical Modeling of Loop Heat Pipes and

Mathematical model of a loop heat pipe with cylindrical evaporator and integrated reservoir Applied Thermal Engineering,Vol.28,No.8-9 Experimental study on the loop heat pipeMathematical Modeling of Loop Heat Pipes andMathematical model of a loop heat pipe with cylindrical evaporator and integrated reservoir Applied Thermal Engineering,Vol.28,No.8-9 Experimental study on the loop heat pipeMathematical Modeling and Analysis of Heat Pipe Start-Up The start-up process of a frozen heat pipe is described and a complete mathematical model for the start-up of the frozen heat pipe is developed based on the existing experimental data.The model is simplified and solved numerically.

Mathematical Modeling and Analysis of Heat Pipe Start-Up

Mathematical Modeling and Analysis of Heat Pipe Start-Up From the Frozen State J.H.Jang, The start-up process of a frozen heat pipe is described and a complete mathematical model for the start-up of the frozen heat pipe is developed based on the existing experimental data.The model is simplified and solved numerically. J.Heat Transfer.Mathematical Model for Fluid Flow and Heat Transfer Keywords fluid flow,heat transfer,mathematical model,numerical solution.1.Introduction .Regarding the methods for energy and process engineering investigation,most often mean we models and modeling,as the most common method used.Mathematical modeling,of course as an indivisible part of it,has commonly used equations,likeIntroduction.The heat pipe is a vaporliquid phase-change device that transfers heat from a hot reservoir to a coldMathematical model.A mathematical model is created in MS Office Excel Basic on computing relations of heat transferGraphic dependencies of the mathematical model.Based upon(PDF) A Mathematical Model Predicting Heat Transfer A mathematical model predicting the oscillating motion in an oscillating heat pipe is developed.The model considers the vapor bubble as the gas spring for the oscillating motions including effects

Hydrodynamics and Heat Transfer of Circulating Two-Phase

Dec 20,2019 mathematical model for heat transfer limitations of heat pipe#0183;A circulating two-phase Taylor flow in a microchannel was considered to be more efficient for overall heat transfer in a heat pipe compared to the pulsating (oscillating) heat pipe.A mathematical model describing the main parameters of a two-phase flow is constructed.The experimental study of hydrodynamics and heat transfer of a circulating two-phase (liquidvapor)Heat Pipe Design and Technology SpringerLinkThis book provides a practical study of modern heat pipe engineering,discussing how it can be optimized for use on a wider scale.An introduction to operational and design principles,this book offers a review of heat and mass transfer theory relevant to performance,leading into and exploration of the use of heat pipes,particularly in high-heat flux applications and in situations in which EVALUATING MATHEMATICAL HEAT TRANSFERflow conditions were assumed in the two techniques; mathematical and CFD models.In certain cases and usually at the end of such equations,a check is required for a possible further iteration.Refer to Appendix 1 for such an example.The example in Appendix 1 refers to heat transfer across a pipe surface area towards water

Double Pipe Heat Exchanger Design with Counterflow or

Determination of the heat transfer surface area needed for a double pipe heat exchanger design can be done using the basic heat exchanger equation Q = UA Tlm,where Q is the rate of heat transfer between the two fluids in the heat exchanger in Btu/hr,Analysis of a heat pipe in a field of body forces opposing A mathematical model is proposed for a heat tube which employs a homogeneous wick and an essentially low-temperature heat-transfer agent and which operated with a partially wetted wick in a field of mass forces.The calculation of heat-tube parameters is demonstrated by an example.It is shown that heat fluxes are much smaller in the presence than in the absence of a field of mass forces.An investigation of oscillating motions in a miniature for liquid/vapor ow in a heat pipe will signicantly increase due to the frictional shear stresses,which directly limits the heat transfer capability in a traditional heat pipe.Comparing with the traditional heat pipe,the pulsating heat pipe presents a number of new features (1) higher driving forces thermally driven pulsating ow

Advances in Mechanical Engineering Three-dimensional

created a mathematical model in MS Excel for comput-ing relations of heat transfer limitations,which define the boundaries of heat pipe performance.The limita-tion values depend on heat pipe parameters,wick struc-ture parameters,and the thermophysical properties of 1Heat-Pipe and Thermal Tools Design Research Unit (HTDR),ANALYTICAL HEAT TRANSFERThese are lecture notes for AME60634 Intermediate Heat Transfer,a second course on heat transfer for undergraduate seniors and beginning graduate students.At this stage the student can begin to apply knowledge of mathematics and computational methods to the problems of heat transfer.Thus,A mechanistic model of heat transfer for gasliquid flow Oct 27,2017 mathematical model for heat transfer limitations of heat pipe#0183;The model was tested with heat-transfer experiments for air/water flow in a 63.5-mm inside diameter (ID) tube.Guo et al.established a mathematical model of heat transfer in a gas-drilling system,considering the flowing gas,formation fluid influx,JouleThomson cooling and entrained cuttings in the annular space.However,the multiphase

A heat transfer model of a horizontal ground heat

Apr 21,2016 mathematical model for heat transfer limitations of heat pipe#0183;As a result,a mathematical model which describes the dependence of the heat transfer rate per unit length of the horizontal GHX pipe on the thermal properties of soil,operating time of GHX and the distance between pipes was obtained.Using this model,heat transfer rates per unit length of a horizontal GHX were plotted as functions of the distance between pipes and operating time.TheA THREE-DIMENSIONAL NUMERICAL ANALYSIS OFmathematical model describes heat transfer between two fluids in the heat exchangers.The heat transfer process includes convective heat transfer from warmer fluid (water) to the pipe wall surface,conduction of heat through the pipe wall,and then the heat from the pipe wall is in part transferred by convection on the flowing air,and in part A Model for Analyzing Temperature Profiles in Pipe Walls Feb 12,2015 mathematical model for heat transfer limitations of heat pipe#0183;T0 is the initial temperature of the fluid,Teq is the temperature profile/gradient between the fluid and pipe,m is mass of water flowing through the pipe,A is the cross-sectional area of the pipe,and is the density of the pipe.Combine (8) (10); that is,U = PrRe / Nu = CpUa / hz.

A Mathematical Model of an Oscillating Heat Pipe Heat

Jun 09,2011 mathematical model for heat transfer limitations of heat pipe#0183;A mathematical model predicting the oscillating motion in an oscillating heat pipe is developed.The model considers the system multidegree oscillation of vapor bubbles and liquid plugs,including the effects of filling ratio,operating temperature,gravitational force,and temperature difference between the evaporator and condenser.A Mathematical Model for Optimizing the Structure of a A three-dimensional mathematical model is developed for a kind of micro heat pipe with fiber wick.The effects of phase changing,the contact angle,gravity,and heat conducting between the fibers are accounted in the model.The governing equations are formulated in the control volume and calculated by iteration.The calculated results of the model present the velocity of the working material A Mathematical Model Predicting Heat TransferA mathematical model predicting the oscillating motion in an oscillating heat pipe is developed.The model considers the vapor bubble as the gas spring for the oscillating motions including effects of operating temperature,non-linear vapor bulk modulus,and temperature difference between the evaporator and the condenser.


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