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Simcenter FLOEFD
Facilitating simulation for the built environment and occupant comfort
Siemens Digital Industries Software is a leader in the simulation of airflow and temperature for the built environment. Its Simcenter™ FLOEFD™ software is a frontloading computational fluid dynamics (CFD) solution that is designed to work inside computer-aided design (CAD) software. This enables the user to simulate airflow and heat transfer using 3D CAD models, with no need for data translations or copies.
Simcenter FLOEFD can be used to solve Navier-Stokes equations. It can predict both laminar and turbulent flows. It employs one system of equations to describe both laminar and turbulent flows. Moreover, it is possible to transition from a laminar to turbulent state and/or vice versa.
The Simcenter FLOEFD HVAC module provides additional capabilities for design engineers who conduct analysis in support of heating, air conditioning and ventilation (HVAC) applications, such as :
Benefits
Assess thermal comfort
Test efficiency of HVAC systems
Design to meet stringent environmental regulations
Comfort parameters
To assess the thermal comfort of an occupant and the efficiency of the ventilation system, the following comfort parameters are offered with the HVAC module :
Predicted mean vote (PMV)
Predicted percent dissatisfied (PPD)
Operative temperature (K)
Draft temperature (K)
Air diffusion performance index (ADPI)
Local air quality index (LAQI) for fluids
Contaminant removal effectiveness (CRE) for fluids
Flow angle (X, Y and Z)
The following comfort parameters are already included in the basic Simcenter FLOEFD : local mean age (LMA), local air change index (LACI) and dimensionless LMA.
Advanced radiation model
Advanced capabilities with the discrete ordinate (DO) radiation model allow for more realistic radiation simulation by capturing the following effects :
Absorption of radiation within semitransparent solids such as glass
Wavelength dependency of solid and surface properties as well as spectral characteristics of radiation sources
Specularity coefficient to ensure appropriate reflection on surfaces
Refractive index to ensure reflection and propagation of light traveling through objects
Materials library
Aside from the basic materials, the following items are available :
Large database of building-specific materials such as concrete, gravel, timber, asphalt and tiles
Database of solid materials such as alloys, ceramics, metals, polymers, laminates, glass and minerals
The HVAC module’s postprocessing capabilities also offer a tracer study, an admixture to analyze the propagation of low-concentration gasses or water vapor, which predicts condensation and evaporation regions.
Simcenter FLOEFD allows you to model the following physical phenomena :
Complex flows in rooms (forced and natural convection)
Ventilation and comfort models
Industrial hygiene
Airflow around and through buildings
Chemical or biological agent transport
Simulation of relative humidity and condensation (H2O in air)
Simulation of flows of gas mixtures (contamination, exhaust gas emissions)
Pressure drop optimization in equipment
Heat transfer performance (heat exchangers)
Determination of forces and torque on movable parts
Determination of flow rates with fans, pumps, blowers
Determination of flow rates through vents, etc.
Simulation of solar radiation, surface-to-surface radiation
Particle tracking (clean rooms)
Heat exchangers with different phases in separated cavities (for example, gas/fluid)
What-if testing made easy
One of the most powerful features of Simcenter FLOEFD is the ease with which you can conduct what-if analyses. The process is simple. Create your base model and analyze it. Then create multiple variations of your design by modifying the solid model without having to reapply material properties, etc. When the analysis is complete, Simcenter FLOEFD makes it easy to compare the results among the many options to choose your best possible design. When you are satisfied with your design, publish your report with the touch of a button. You can even publish a fully interactive 3D dynamic plot and share it with colleagues or customers.
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