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Showing 1 to 20 of 29 for “"Thermal contact resistance"”.
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Thermal contact resistance.
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1967.
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Vibration effects on thermal contact resistance.
Massachusetts Institute of Technology. Dept. of Nuclear Engineering. Thesis. 1967. M.S.
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Thermal Contact Resistance in a Vacuum Environment
Made available in DSpace on 2014-12-09T17:13:29Z (GMT). No. of bitstreams: 1 6406036.pdf: 6363004 bytes, checksum: c156ec61878e4b40ad1a1386a418dfa4 (MD5) Previous issue date: 1963
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An Inverse Algorithm To Estimate Thermal Contact Resistance
Thermal systems often feature composite regions that are mechanically mated. In general, there exists a significant temperature drop across the interface between such regions which may be composed of similar or different materials. The parameter characterizing this temperature drop is the thermal …
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Prediction of the Macroscopic Contact Area in Thermal Contact Resistance
Made available in DSpace on 2014-12-09T17:13:43Z (GMT). No. of bitstreams: 1 6808165.pdf: 2604457 bytes, checksum: 3778cd3b1e03a5af532737b4f598362e (MD5) Previous issue date: 1967
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Structural health monitoring of bolted joints using thermal contact resistance and ultrasonic signals
… methods include using ultrasonic signals and thermal contact resistance metrics correlated to contact pressure to assess the joints integrity. Moreover, contact pressure distribution at the joint surface was examined using pressure sensitive films. Experimental measurements showed that there …
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A multi-scale iterative approach for finite element modeling of thermal contact resistance
… a key factor in the performance of many contact applications including thermal contact resistance. However, essentially all analytical and numerical models of thermal contact resistance and thermal contact conductance either neglect surface topography or make simplifications and …
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De-risking thermal management challenges in automotive vehicles: oil circulation and thermal contact resistance
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2027-05-01
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An assessment of fin-tube thermal contact resistance in round-tube-plain-fin heat exchangers
… but a drawback is the potentially large contact resistance between tubes and fins. Previous studies have investigated this topic under the exclusion of air-side convection. The present work is more realistic, because the contact resistance is evaluated in the presence of air-side …
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Non-invasive Method to Measure Energy Flow Rate in a Pipe
… install and less expensive has been developed. A thermal interrogation method using heat flux and temperature measurements is used. A transient thermal model, lumped capacitance method LCM, before and during activation of an external heater provides estimates of the fluid heat transfer coefficient …
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Thermal-mechanical analysis of targets for high volume production of molybdenum-99 using low-enriched uranium
… processing. The drawback of these designs is the thermal contact resistance between the LEU and aluminum cladding during irradiative heating is very sensitive to the target design, manufacture, and irradiation holder. This thesis explores those thermal-mechanical design issues for both the …
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Effective Thermal Properties of Granular Porous Media: A Numerical Study using Lattice Blotzmann Methods
… biological sciences, to name a few. Effective thermal conductivity in granular porous media is a function of morphological features of the medium such as grain shape, grain size, and geometrical structure. Thermal contact resistance can also affect heat conduction due to topological features …
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Validation of a Noninvasive Blood Perfusion Measurement Sensor
… to noninvasively estimate blood perfusion using thermal methods. A combination thermocouple/thermopile sensor records heat flux and temperature measurements on the tissue of interest (in this case skin) for a given period of time. These data, in combination with other experimental parameters, are …
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Thermal imaging and analysis of carbon nanotube composites
… surprisingly little is still known about the thermal properties of such CNT films, and in particular about the intertube junctions. This study examines suspended films of conductive single-wall CNT (SWNT) films through electrical measurements and optical infrared (IR) thermometry in order to …
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Development of Methodologies for the Noninvasive Estimation of Blood Perfusion
… to noninvasively estimate blood perfusion using thermal methods. This is accomplished by the combination of a bioprobe, biothermal model, and parameter estimation techniques. The probe consists of a heat flux sensor and surface thermocouple placed in contact with tissue while the opposite side is …
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A Study of Heat Transfer Through Periodically Contacting Surfaces
… the interface between two solids which make contact and then separate periodically. The cycle of contact and separation is continuous and the quasi-steady state only is considered. The system chosen as the model for study comprised two identical solid bars, arranged with their longitudinal …
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Simultaneous nanothermal analysis using heated microcantilevers
… properties characteristics can be measured using thermal analysis techniques, but macro-systems aren’t ideal for all applications. Conventional systems require large samples, preventing size-dependent studies on thermodynamic properties of a material. Furthermore, some materials cannot be …
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Enhancing the heat transfer performance of compact heat exchangers by minimizing the contact resistance between fins and tubes
Thermal contact resistance or, its reciprocal, thermal contact conductance is an important parameter in a wide range of thermal phenomena. It plays a significant role in heat transfer applications such as electronic packaging and nuclear reactors. This parameter also appears in fin-tube heat …
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Two-dimensional quench propagation model for a three-dimensional "high-temperature" superconducting coil
Quenching is a thermal failure mechanism encountered with superconducting magnets. When a section of conductor is driven normal by an external heat input, the magnet transport current flows through a resistance, causing joule dissipation. If heat is not conducted away from the normal region faster …
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A Novel Thermal Method for Pipe Flow Measurements Using a Non-invasive BTU Meter
… and temperature measurements for non-invasive thermal interrogation (NITI). In this work, the CHFT+ sensor embodiment is referred to as the British Thermal Unit (BTU) Meter. The fluid's flow rate and temperature are determined by estimating the fluid's convection heat transfer coefficient and …
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