This tutorial is uses the same geometry as CVD Chamber Mixing, but focuses on heat transfer with radiation. Radiation plays an important role within confined geometries where radiative surface properties vary greatly. In this modeling effort, we concentrate on obtaining the temperature distribution inside
and on the walls of the chamber when a constant heat flux of 3000 W/m2
is generated at the lower surface of the pedestal.
The goal of this tutorial is to demonstrate simulations of a 3D ICP with
the complex shape of the coil. Engineering problems frequently contain embedded objects or components that are pre-dominantly one-dimensional, i.e., long and slender and with transverse length scales that are much smaller thanthe isotropic length scales of the multi-dimensional space in which the objects are embedded.Those objects are called filaments. Examples include micro-channels, in fluidic devices, optical or electrical leads, resistive electric micro-heaters, or conducting paths in micro-chips.
This tutorial sets up simulations of thermally inductively coupled plasma at atmospheric pressure including effects of radiation heat transfer and conjugated flow/wall heat transfer. The tutorial employs the power of user subroutines to define the properties of the Argon gas found in the plasma tube. The relative permittivity, electrical conductivity, specific heat and thermal conductivity of the Argon gas are set using the user subroutines.
This is a 3D model of chemical binding kinetics in a millimeter-scale biosensor. The objective of the model is to investigate the effects of various kinetic parameters on the simulated response. A general objective of modeling such problems (not covered here) could be to evaluate the effectiveness of the mathematical model for extracting kinetic parameters from the sensogram.
The goal of this tutorial is to obtain the flow field resulting from the interaction
of the two merging streams as well as the species spatial concentration inside the
geometry.
Dielectrophoresis occurs because of the interaction between the induced dipole and the electric field. The interaction creates a net force, which depends on both the gradient of the electric field and electrical properties (permittivity and conductivity) of the particle and the media. The net force applies on partices, charged or not, and drives them to move. This technique can be used in the analysis, manipulation, and separation of cellular scale and nanometer scale particles like cells, DNA etc.
DNA Hybridization is a method for combining one strand of DNA sample against other (second) strand of DNA probe on a single support membrane. The degree of binding depends on the molecular geometries. The signal for a given geometry and kinetic parameters are evaluated in this tutorial.
Electrokinetic injection is an alternate method of loading DNA sample onto the capillary separation matrix for capillary electrophoresis compared to hydrodynamic or manual loading.This transfer is directly dependent on the magnitude and duration of voltage applied across the capillaries. This tutorial investigates the electrokinetic
injection and separation of analytes in a cross channel under the influence
of an electric field.
In certain applications, different regions of the computational domain experience flow conditions that are so different that it is very difficult for a single solver to produce accurate results at the extremes. In many situations, such problems can be separated and solved using loosely coupled solvers. Each solver is chosen to provide highly accurate solutions for the prevailing flow conditions.
ESI's CFD-FASTRAN, a compressible flow solver, is ideally suited for high speed external aerodynamics problems and the multi-physics solver CFD-ACE+ is ideally suited for heat transfer problems involving conduction, convection (natural and forced) and radiation.
A large amount of aerodynamic heating is generated over hypersonic vehicles during re-entry. Thermal Protection System (TPS) materials are employed to prevent the heating from conducting into the internal cabin, which holds electronic devices, passengers and other vital components. As a time-dependent process, the material making up TPS is at a low temperature and “soaks up” the heat – the conductivity of the material transports the heat (from the vehicle surface) through the thickness. The material will also re-radiate some of the heat back to the flow – the amount depending on the emissivity of the material. A primary concern is to estimate the effects of aeroheating on the internal volume of the capsule and its effect on electronic devices, passengers and cooling systems. In this application, typically the external flow is hypersonic in nature, whereas the flow within the capsule is a very low speed flow dominated by natural convection. In addition, to hypersonic aerodynamic heating, several other physics including heat conduction, natural convection and radiation has to be accurately modeled. CFD-FASTRAN solves for the external hypersonic flow and CFD-ACE+ solves for heat conduction, convection and radiation. Exchange of heat flux/temperature data between FASTRAN and ACE occurs at defined interfaces.
