2022
Physics and Theory behind nanoFluidX
View new features for nanoFluidX 2022.
nanoFluidX is a software to simulate single and multi-phase flows based on the Lagrangian Particle Method Smoothed Particle Hydrodynamics (SPH).
Create a nanoFluidX model using SimLab.
How to run a nanoFluidX model.
How to postprocess nanoFluidX results using ParaView.
Guidance on modelling specific usecases with nanoFluidX.
nanoFluidX commands and parameters with examples.
Both single phase surface tension and adhesion modeling is based on the work of Akinci et al.
The body force, defined through acceleration in units of [m/s2], can be varied over time using an input file.
Energy equation in nanoFluidX is implemented so that it accommodates for conduction and convection heat transfer with initial or Dirichlet boundary conditions.
Direct export of the heat transfer coefficient on provided .stl surfaces is possible in nanoFluidX. This section clarifies some of the theoretical aspects of the implementation.
Description of the sliding frame functionality as a part of the nanoFluidX frame suite feature.
Standard SPH interpolation heavily depends on the basic premise that each particle has the so called full support. Full support implies that the owner particles can see particles all around itself within the smoothing length of the particle, which mathematically implies that the sum of the kernel, also known as Shepard coefficient, is equal to one.
Inlet regions mimic the behavior of inlets with a superposed impose region and allow spawning particles anywhere within the computational domain.
Keychain validator compares the keychains in the .cfg file with valid nanoFluidX keychains, when activated.
nanoFluidX implementation of the multiphase surface tension model heavily relies on the work of Adami et al.
Outlet regions mimic the behavior of outlet and simple outlet using a combination of removal and extended regions.
The operationMode option allows you to change the solver for either minimal run time or maximum accuracy.
Sub-phasing capability, while essentially optional, represents structural change inside nanoFluidX more than a classic feature.
Some main principles and consequences of the transport velocity.
New viscosity-temperature coupling (viscTempCoupling) has been introduced into the nanoFluidX code as an option. Three models were implemented: polynomial, Sutherland, and power law.
Aeration-viscosity models were depracated in the 2022 release because the models involved required a set of parameters which were difficult to obtain and/or required calibration.
nanoFluidX validation cases.
References used throughout the nanoFluidX manual.
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