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September 2015

CRTech Announces the release of Version 5.8 with Compartments, Ports, Reducers and Expanders, and the Model Kicker


boulder, co - september 2, 2015

version 5.8 is now available for sinda/fluint, thermal desktop, radcad®, flocad®, td direct, and ezxy. with this version we have greatly extended functionality by introducing compartments, ports, reducers and expanders, and the model kicker. additionally we have made improvements to external model references, curved elements, and data mapping. for a complete list of updates, please see the release notes in the user manuals for sinda/fluint, thermal desktop, and td direct.

general features

the model kicker provides an easy-to-use means of both checking a model and gaining intuition about how it behaves thermally. the model kicker perturbs (“kicks”) the temperature of a portion of the model from a baseline steady state solution and shows the relative strength of the thermal connections.

the processor status plotter graphs user-selected values during the solution to ensure it is progressing as expected. identify issues as they occur!

fluid modeling

fuel tanks, boilers, steam drums, dewars (cryostats), immersion coolers, and autoclaves are all examples of partially filled vessels. tracking which walls and internal structures are wet is important, especially as a function of fill level and orientation. it is also important to track the location of vents, fill lines, drains, and other connections relative to the liquid/ullage level. compartments provide a general purpose means of modeling a vessel and the heat transfer between the fluid and potentially complex walls and other structures.

ports identify locations on compartment walls or pipes where liquid and/or gas can enter or exit. instead of connecting to a lump directly, any flow path may instead connect to a port, and that port can connect to the lump at a precise location. the use of ports on pipes provides a powerful alternative to merging pipes.

reducers and expanders, which represent sudden expansions and contractions, diffusers, nozzles, and venturi tubes, are now included as component models.

thermal modeling

external component models can now be reused multiple times within a system-level model using td block references. each td block is unique in the thermal solution, but changes to the component model can be propagated throughout the system model.

significant enhancements have been made to curved elements. curved elements allow users to accurately model arbitrary geometry with fd-like resolution. two options for radiation are now available: tessellated surfaces for rapid calculations, or true curved for demanding applications such as reflectors.

providing temperature fields for structural analyses is now easier with advanced mapping. the data mapping now finds the closest match for temperature results without user-defined tolerances.

for systems with insulation, the boundary condition mapper can now map thickness values over the entire surface for systems with varying insulation thickness. temperature results through the thickness of the insulation can be easily displayed with the new insulation ribs.


crtech provides products and services in the areas of heat transfer and fluid system design and analysis. our customer base spans a broad spectrum of industries. our tools have been chosen by nasa, boeing, and lockheed martin as their standard for thermal analysis. we are the authors of the codes we sell and support commercially with personnel devoted to customer support, marketing, sales, training, and consulting. for more information please visit www.crtech.com.

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