C&R Technologies, Inc. ("CRTech") was created in 1991 by Brent Cullimore and Steve Ring. Having supported the development of SINDA/FLUINT since the early 80's, Steve and Brent took on the task of transitioning SINDA/FLUINT from a NASA-developed code to a commercial product. They began by updating and greatly enhancing SINDA/FLUINT and by providing the first-ever graphical interface, SinapsPlus® (predecessor to Sinaps®). From there the growing team continued with the development of RadCAD®, a replacement for the long-time standard thermal radiation modeling package TRASYS. Over the years, improvements and software suite expansions continued with the introduction of Thermal Desktop®, FloCAD® and TD Direct®, always with the goal of enabling fellow thermal and fluids engineers.

As a team of thermal, fluid, and chemical engineers, we understand the needs of our customers and have the knowledge to create software to meet these needs. The result is that CRTech is a world-wide powerhouse in thermal and fluids analysis software. We are not an all-in-one analysis solution for everything from stress to dynamics because we are unwilling to make the necessary compromises. We do one thing, and we do it very well.

Our customer base of over 5000 users in over 40 countries spans a broad spectrum of industries. We are the authors of the codes we sell and support commercially with personnel devoted to customer support, marketing, sales, training, and consulting.

We know what you need, so we produce tools unique to our world.

Our Core Products are:

There may be times that you are not able to purchase our software, learn how to use it, and solve your problem within your budget and time constraints. CRTech can solve this dilemma for you. We offer a full analysis consulting service for just this problem.

We also provide training in the use of all our products. See the Training page for a description of future and past courses.

Our numerous clients span such diverse industries as aerospace, aircraft manufacturers, petrochemical, electronics, automotive, energy, medical, and others:

Air Force Institute of Technology


ATA Engineering

Ball Aerospace

Blue Origin


Brigham Young University



German Aerospace Center

Embry Riddle

General Motors


Harris Corporation

Hokkaido University

Instituto Nacional de Pesquisas Espaciais



Johns Hopkins University

L-3 Communications

Lockheed Martin


MIT Lincoln Laboratory


Montana State


Naval Research Laboratory

NEC Corporation

New Mexico State University

Northrop Grumman

Nuclear Waste Partnership



Pennsylvania State University


Southwest Research Institute

Space Systems Loral


Thales Alenia Spazio

The Aerospace Corporation

UC Berkeley


United Launch Alliance

University of Arizona

University of Colorado

University of Nagoya

US Air Force

US Army

Utah State University

Virgin Galactic


flow regimes

Introduction to Two-phase Flow

September 24, 2-3pm MDT

This webinar introduces basic concepts in two-phase flow modeling including quality, void fraction, flow regimes, slip flow, pressure drops and accelerations, and heat transfer.

No knowledge of CRTech software is required. However, references to the corresponding FloCAD features will be made to assist users of that product.

Click here to register

Introductory FloCAD Training

Class times: September 5, 10, and 12, 2019, 9:00 am to 12:00 pm MDT daily
Cost: no charge (attendees must have an active support contract)

CRTech will be hosting introductory training for FloCAD (Flow Modeling in Thermal Desktop). This is our standard FloCAD class previously hosted in a classroom environment and now restructured for an online teaching environment.

The class will introduce single-phase fluid modeling concepts and how to build fluid models within the FloCAD work environment. Topics covered include an introduction to fluid modeling components, geometric versus non-geometric modeling options, working with FloCAD Pipes, solution control, and an introduction to path and pipe libraries.

The class will be broken into three two- to three-hour sessions held over a 3 day period. The format will be online lecture and demonstration with opportunities to ask questions. Hands-on lab work will be provided to students to work on after each session. To gain the most from this class, students are encouraged to attend all three sessions.

Prerequisites: Attendees must have basic working knowledge of Thermal Desktop as many of its base features will not be covered in this class but their usage is required for FloCAD.

Eligibility Requirement: This class is a service to our customers. All attendees must have an active support contract. If you are unsure of your support status, please contact CRTech.

Click here to register