Keyword: Heat transfer

Briefs: Manufacturing & Prototyping

Two mounting schemes were devised for attaching heater wires to special-purpose glass tubing used in a capillary-heat-transfer experiment. Not only were the wires required to...

Briefs: Mechanical & Fluid Systems

A prototype Stirling-engine regenerator containing a matrix made of carbon-fiber-based composite materials has been developed. The concept underlying this development effort is one of...

Briefs: Photonics/Optics
Computer Code for Analysis of Stress in Silicon Wafers

The MacWafer™ code computes gravitational and thermal stresses in silicon wafers and uses these results to determine the maximum allowable temperature variation across a wafer, maximum processing temperatures, and maximum allowable heating and cooling rates. This information is of...

Briefs: Electronics & Computers

As electronic circuits become more densely packaged and higher in power, maintaining them within permissible temperature ranges becomes a major issue. This is especially true in the case of...

Briefs: Robotics, Automation & Control

Microscopic forced-flow heat-transfer systems containing heat exchangers, flow channels, electrostatically driven peristaltic pumps, and related components have been proposed. These...

Briefs: Physical Sciences

A hybrid-grid scheme has been developed to afford a computationally efficient means for numerically solving equations of both (1) coupled flows of heat and mass in a fluid and (2)...

Briefs: Software
Program for Microanalysis of Composite Structures

Version 3.0 of the Boundary Element Solutions Technology Composite Modeling System (BESTCMS 3.0) is an advanced engineering software system for the microanalysis of fiber composite structures. BESTCMS is based on the BEST3D boundary-element program (COSMIC program LEW-15351). BESTCMS affords...

Briefs: Physical Sciences

A heat exchanger made largely from pieces of single-crystal silicon has been designed for use as a recuperator in a reverse-Brayton-cycle cryocooler. Its design is optimized for transferring...

Briefs: Physical Sciences

The figure illustrates an apparatus for measuring heat-transfer and pressure-drop characteristics of porous plug specimens in oscillating flows. The apparatus is built around an...

Briefs: Physical Sciences
Evaluation of Droplet-Evaporation Models for Gas/Liquid Flow

A report presents an evaluation of eight mathematical models of the evaporation of liquid droplets — models that are used in the numerical simulation of a variety of gas/liquid flows, including cooling sprays, burning liquid-fuel sprays, fire-suppression sprays, and...

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