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NX Space Thermal
for 
Advanced Simulation environment is an industry-specific vertical application
for thermal analysis of space systems.
Aplicaciones de NX Space Thermal
 Specific
capabilities for the Space industry
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Orbital models for all planets of our solar system at
any specific point in time and attitude
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Powerful and fast view factor calculations (including
parallel computing for large space thermal models)
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Powerful and smart view factor transient
re-calculations for the case of articulation simulations, such as for
solar panel joints rotation allowing constant pointing at the sun or
antenna pointing to specific location
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Efficient transient solution for thermal shock
transient analyses during eclipse
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Multi-layer shells specific formulation for MLI and TPS
applications
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Interfaces to:
- SINDA
- TSS
- TRASYS
- ESTAN
- ESARAD
- Thermica
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NX
Space Systems Thermal solver capabilities
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Steady-state (linear and nonlinear)
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Large selection of 1D/2D/3D linear and parabolic finite
element types supported
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Material nonlinear thermal properties
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Multi-layer shells for MLI and TPS applications
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Axi-symmetric modeling
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Cyclic thermal problems
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Iterative conjugate gradient solver technology
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Fully coupled conduction, radiation and convection heat
transfer simulation
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1D duct and hydraulic network elements
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Motion and articulation modeling (translational motion
and rotational joints)
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Thermal
Coupling technology for modeling thermal contacts within NX assembly
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Thermally connect disjoint and dissimilar mesh faces
and edges
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Surface-to-surface, edge-to-edge or edge-to-surface
contact modeling between parts: constant, time or temperature-dependent
coefficient of heat transfer, resistance or conductance
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Radiative exchange between disjoint part faces, and
faces within a single part
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Interface modeling between connected parts: constant,
time or temperature-dependent coefficient of heat transfer, resistance or
conductance
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Convective exchange correlations between faces:
parallel plates, concentric spheres or cylinders
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Join
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One Way heat transfer
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User defined
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Connection break, Series or T-junction
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Optical,
material and surface properties
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Electrical resistivity
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Phase change and ablation properties
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Extinction coefficient
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Refraction
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Bi-variate tables
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Transmissivity/specularity
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Angle-dependent optical properties
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Applied
heat loads
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Constant and time-dependent:
- Heat loads
- Heat flux
- Heat generation
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All applied loads can be controlled with
temperature-controlled thermostat conditions or PID controllers
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Radiative heating
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Peltier coolers modeling
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Electrical joule heating
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Temperature
boundary conditions
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Constant temperature for steady-state or transient
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Time varying for transient and for nonlinear
steady-state
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Thermostat temperature controls or PID controllers
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Conduction
heat transfer
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Handles large conduction models (memory efficient data
scheme)
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Temperature-dependent conductivity, specific heat
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Orthotropic conductivity
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Heat of formation at phase change temperature
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Convection
heat transfer
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Constant, time and temperature-dependent heat transfer
coefficients
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Parameter and nonlinear temperature gradient functions
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Free
convection
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Correlation-based free convection to ambient for
inclined plates, cylinders and spheres
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Forced
convection
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Correlation-based convection for plates, spheres and
cylinders in forced fluid flow
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Radiation
heat transfer
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Constant and temperature-dependent emissivity
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Multiple radiation enclosures
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Diffuse view (form) factor calculations with shadowing
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Net view (form) factor calculations
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Adaptive scheme for view (form) factor sum optimization
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Hemicube-based view (form) factors calculation using
graphics card hardware
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Radiation patch generation to condense large
element-based radiation models
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Radiation matrix controls and parameters
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Additional radiation request types:
- Among group
- Group-to-group
- Monte Carlo calculation method
- Enhanced radiation with Ray Tracing
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Initial
conditions
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Starting temperatures for both steady-state and
transient
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Starting temperatures from previous solution results,
from file
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Solver
solution attributes
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Restart conditions
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Cyclic convergence criteria
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Direct access to solver parameters
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Solver convergence criteria and relaxation factors
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Solver monitor with solution convergence and attributes
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Intermediate results display and recovery directly from
solver progress monitor
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Open Architecture (user subroutines)
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Support to include external files
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Other
features
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Results Reporter
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Summary of results to MS® Excel worksheets
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Heat flow calculation between groups
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Heat maps
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Complete or partial deactivation of selected elements
(for radiation form factors calculations)
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Temperature mapping for Nastran FE models
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Results
post-processing
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Temperatures
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Temperature gradient
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Total load and flux
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Conductive flux
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Convective flux
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Convection coefficients
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Residual
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Heat map
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View factor sum
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