A new method of measuring thermal contact conductance

Rosochowska, Malgorzata; Chodnikiewicz, K.; Balendra, R.

doi:10.1016/s0924-0136(03)00671-x

Cited by 49 publications

(21 citation statements)

References 19 publications

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“…Thus, the uncertainty in the temperature drop on the basis of thermocouple errors is evaluated as 6.67-20, 2.96-13.3 and 0.7-9.76 % for copper, brass and stainless steel respectively. Moreover, uncertainty in the temperature drop at the interface due to extrapolation errors has been calculated by using the method described in literature [44,45]. It has been found to lie in the range of: 1.33-4.0, 0.6-2.7 and 0.14-1.95 % for copper, brass and stainless steel, respectively.…”

Section: Temperature Drop Measurementmentioning

confidence: 99%

Experimental investigation of thermal contact conductance for nominally flat metallic contact

Tariq

Asif

2015

Heat Mass Transfer

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Joint thermal contact conductance h r Radiation heat transfer coefficient ΔT Temperature drop across the interface H Vickers hardness k Effective thermal conductivity, k = 2k 1 k 2 / (k 1 + k 2 ) m Effective arithmetic average slope, m = m 2 1 + m 2 2 P Normalized pressure, P = P H P Applied pressure Q Heat flow rate R qEffective root mean square roughness,U Q 1 , U Q 2 Uncertainties in the estimation of heat fluxes, Q 1 and Q 2

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Section: Temperature Drop Measurementmentioning

confidence: 99%

Experimental investigation of thermal contact conductance for nominally flat metallic contact

Tariq

Asif

2015

Heat Mass Transfer

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“…The boundary value problem for the Lagrange multipliers λ 1 (x,t) and λ 2 (x,t) is obtained by allowing )] ( [ t h S Δ to go to zero by vanishing the integrands containing ΔT 1 (x,t) and ΔT 2 (x,t) on the right-hand side of equation (7). Result will lead to the following adjoint problem: Region 1 (0≤x≤1):…”

Section: The Adjoint Problemmentioning

confidence: 99%

“…In the past years, the experimental study of thermal contact was of increasing interest to researchers and industrial engineers [1][2][3][4][5][6][7][8][9]. A few numbers of these researches are related to periodic thermal contact.…”

Section: Introductionmentioning

confidence: 99%

Inverse heat transfer problem of thermal contact conductance estimation in periodically contacting surfaces

2009

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The problems involving periodic contacting surfaces have different practical applications. An inverse heat conduction problem for estimating the periodic Thermal Contact Conductance (TCC) between one-dimensional, constant property contacting solids has been investigated with conjugate gradient method (CGM) of function estimation. This method converges very rapidly and is not so sensitive to the measurement errors. The advantage of the present method is that no a priori information is needed on the variation of the unknown quantities, since the solution automatically determines the functional form over the specified domain. A simple, straight forward technique is utilized to solve the direct, sensitivity and adjoint problems, in order to overcome the difficulties associated with numerical methods. Two general classes of results, the results obtained by applying inexact simulated measured data and the results obtained by using data taken from an actual experiment are presented. In addition, extrapolation method is applied to obtain actual results. Generally, the present method effectively improves the exact TCC when exact and inexact simulated measurements input to the analysis. Furthermore, the results obtained with CGM and the extrapolation results are in agreement and the little deviations can be negligible.

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“…Modelling of the temperature field, heat flux or heat transfer coefficient and other phenomena as regards to the process of heat transfer between two solid surfaces has been analysed by several authors, with both commercial software and original formulations having been applied. [4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Modelling of Heat Transfer at the Solid to Solid Interface

Rywotycki

Malinowski

Falkus

et al. 2016

Archives of Metallurgy and Materials

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In technological process of steel industry heat transfer is a very important factor. Heat transfer plays an essential role especially in rolling and forging processes. Heat flux between a tool and work piece is a function of temperature, pressure and time. A methodology for the determination of the heat transfer at solid to solid interface has been developed. It involves physical experiment and numerical methods. The first one requires measurements of the temperature variations at specified points in the two samples brought into contact. Samples made of C45 and NC6 steels have been employed in physical experiment. One of the samples was heated to an initial temperature of: 800°C, 1000°C and 1100°C. The second sample has been kept at room temperature. The numerical part makes use of the inverse method for calculating the heat flux and at the interface. The method involves the temperature field simulation in the axially symmetrical samples. The objective function is bulled up as a dimensionless error norm between measured and computed temperatures. The variable metric method is employed in the objective function minimization. The heat transfer coefficient variation in time at the boundary surface is approximated by cubic spline functions. The influence of pressure and temperature on the heat flux has been analysed. The problem has been solved by applying the inverse procedure and finite element method for the temperature field simulations. The self-developed software has been used. The simulation results, along with their analysis, have been presented.

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A new method of measuring thermal contact conductance

Cited by 49 publications

References 19 publications

Experimental investigation of thermal contact conductance for nominally flat metallic contact

Experimental investigation of thermal contact conductance for nominally flat metallic contact

Inverse heat transfer problem of thermal contact conductance estimation in periodically contacting surfaces

Modelling of Heat Transfer at the Solid to Solid Interface

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