Geostationary Lightning Mapper

Thermal and fluid flow analysis for GLMThe Geostationary Lightning Mapper (GLM) for the GOES-R spacecraft will provide continuous measurement of lightning (in-cloud, cloud-to-cloud, and cloud-to-ground) in the Western hemisphere from a geostationary orbit. The system will collect lightning location and frequency data to aid the forecasting of storm intensity.

The driving thermal requirement for the GLM thermal design was to keep the flocal plane array (FPA) at 25oC ±2oC for any operating radiator temperature between -10oC and +12oC. To achieve this goal, the system uses parallel, temperature-controlled, loop heat pipes (LHPs) located between the FPA interface and a remote radiator. Thermal Desktop and FloCAD were used to simulate transient circulation of the two-phase working fluid within the two LHPs and predict the temperature distribution across the condenser plate. It was also used to validate the method of temperature control for the LHP. Thermal Desktop and FloCAD were selected for the following reasons:

  • Simultaneously solve the flow momentum, energy, and mass conservation equations for the two-phase and single-phase fluid flow for each fluid lump and path separately as well as for the two fluid submodels.
  • Model heat transfer between the fluid and the structure (fluid convection).
  • Model system heat transfer: conductive (conduction in the condenser plate), and radiative (radiation between the environment to the LHP components).
  • Model the phase change heat transfer (evaporation and condensation).
  • FloCAD provides unique and proven tools for modeling LHPs.
  • The ability to model LHP startup transients.
  • The ability to assess load sharing between parallel LHPs.
  • The ability to easily correlate a model to test results.

Download the publication for more information on this system


Reacting Flows

Tuesday May 5th, 2pm MT (1pm PT, 4pm ET)

Reacting Flows is a capability that allows FloCAD to simulate fuel reformers, deal with the electrochemistry of flow batteries, predict combustion reactions in gas generations, and work with ionized and dissociated gases.

This webinar will explain how to use a working fluid as a reactant. It will also detail various options for determining reaction rates such as equilibrium, finite rate with stoichiometric coefficients, and percent complete based on inflowing reagents. Example applications are summarized.

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Dissolved Gases

Thursday May 7th, 2pm MT (1pm PT, 4pm ET)

When vapor meets liquid, it can condense. When gas (NCG) meets liquid, it can dissolve. When there is too much gas in the liquid, it can either evolve slowly at a wall or at the surface ... or it can come out explosively.

Whether your interests are environmental control, liquid propulsion, fire retardant delivery, or beer, this webinar offers a rare glimpse into an advanced modeling topic.

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