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Freezing by Radiation and Convection
Teaching Materials | 16 May 2019 | Contributor(s):: Adam Powell
Use radiation and a heat transfer coefficient to estimate the initial rate of solidification of the solid shell at the top of a casting while the temperature in the shell can be considered uniform, then set up the equation for mixed conduction/convection-radiation limited cooling.
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Heat Conduction and Diffusion in Alloy Casting
Teaching Materials | 16 May 2019 | Contributor(s):: Adam Powell
Derive temperature and liquid concentration profiles during die casting of a roughly plate-shaped alloy part.
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Coextrusion of Multilayer Polymer Sheets
Teaching Materials | 16 May 2019 | Contributor(s):: Adam Powell
Sketch the flow profile of a multilayer polymer flow through an extrusion die and beyond it, and predict the final layer thickness distribution.
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Electron Beam Centrifugal Atomization of Metal
Teaching Materials | 16 May 2019 | Contributor(s):: Adam Powell
Use a heat balance to calculate electron beam power required to continuously heat and melt metal as it is atomized, including heat losses from the top surface due to evaporation and radiation.
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Effective Integration of NIST Reference Data, Reference Materials, and Informatics in Support of Science and Technology
Online Presentations | 15 May 2019 | Contributor(s):: Carlos A. Gonzalez
In this talk, a general description of NIST’s SRM program will be provided, highlighting some examples related to environmental science, clinical diagnoses and petroleum chemistry. In addition, issues related to the effective integration of reference data with reference materials and...
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Interface Enabled Technologies
Online Presentations | 09 May 2019 | Contributor(s):: T. Venky Venkatesan
This talk presents examples of how interfaces of similar and dissimilar materials give us opportunities for new science and possibly new applications.
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CD Injection Molding I: Navier-Stokes
Teaching Materials | 10 Apr 2019 | Contributor(s):: Adam Powell
State simplifying assumptions which can be made regarding radial injection molding of liquid polycarbonate polymer into a CD mold, and simplify the cylindrical form of the Navier-Stokes equations accordingly.
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CD Injection Molding II: Shear Stress
Teaching Materials | 09 Apr 2019 | Contributor(s):: Adam Powell
Solve the cylindrical Navier-Stokes equations simplified in Part I to give the velocity profile in radial injection molding of a CD, and calculate the shear stress based on this velocity profile.
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Radiative Cooling of an Aluminum Cube
Teaching Materials | 09 Apr 2019 | Contributor(s):: Adam Powell
Show that radiative cooling of an aluminum cube is Newtonian (uniform temperature), and calculate time required to cool through a certain temperature range by radiation alone.
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Bottom Filled Mold
Teaching Materials | 07 Apr 2019 | Contributor(s):: Matthew John M. Krane
Calculation of mold filling times, with and without a constant height of metal in a riser. Problem uses modified Bernoulli equation for the mechanical energy balance and the students are asked to determine which resistances are significant.
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Cast-a-Box: Casting Conditions and Macroporosity
Teaching Materials | 07 Apr 2019 | Contributor(s):: Adam Powell
An illustration of three-dimensional finite difference simulation of heat conduction with phase change and complex boundary conditions, this requires students to adjust boundary conditions to make the top surface of a regular hexahedral "casting" to freeze last, eliminating...
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Batch and Continuous Flow Reactors
Teaching Materials | 30 Mar 2019 | Contributor(s):: Adam Powell
Derive expressions for productivity of plug flow and perfectly mixed continuous flow reactors, discuss quality, and describe advantages of batch reactors.
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Blood Filtration
Teaching Materials | 30 Mar 2019
Estimate flow rate of blood through two types of porous filter: an array of tubes and a packed bed of solid spheres.
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Blood Flow and Vascular Deposits
Teaching Materials | 30 Mar 2019
Analyze the effect of increasing fat deposit thickness on blood flow through human arteries.
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Casting of a Cylindrical Part in a Thermally Resistive Mold
Teaching Materials | 30 Mar 2019 | Contributor(s):: Matthew John M. Krane
Use of integral analysis for development of approximate solution for solidification in cylindrical thermally resistive mold.
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Melting point simulation using OpenKIM
Tools | 22 Mar 2019 | Contributor(s):: Martin Hunt, Alejandro Strachan, Saaketh Desai
Computes melting point using a coexistence technique using interatomic potentials from OpenKIM
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Stokes Flow Past a Fluid Sphere
Teaching Materials | 20 Mar 2019 | Contributor(s):: Adam Powell
The solution to the Stokes flow equations for viscous flow past a viscous sphere, which in the limiting cases of zero and infinite interior viscosity gives the drag force on bubbles and solid spheres respectively.
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Application of Integral Analysis to Semi-infinite Diffusion Couple
Teaching Materials | 20 Mar 2019 | Contributor(s):: Matthew John M. Krane
Apply integral analysis to semi-infinite diffusion couple.
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A Heat Transfer Calculation
Teaching Materials | 20 Mar 2019 | Contributor(s):: Adam Powell
Outline the steps required to calculate the temperature at the interface between a stationary solid and a fluid flowing past it.
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Argon Quenching of Ni-based Alloy Cylindrical Bars
Teaching Materials | 20 Mar 2019 | Contributor(s):: Matthew John M. Krane
Calculate radiation viewfactors and power transferred between various parts of an zirconia physical vapor deposition chamber.