Engineering calculators
Thermophysical utilities I use when setting ECAT boundary conditions, checking Reynolds/Mach similarity for HPT campaigns, and teaching fluid mechanics, documented correlations, SI outputs, part of the engineering knowledge platform.
Not sure where to start? 4 places to go
Start with your question
Why visitors arrive: You need a quick thermophysical or fluid calculation with traceable correlations.
Your question: What calculators exist, and what assumptions do they use?
You may also be asking
- How do I size Reynolds or Mach for an experiment?
- Is there probe uncertainty tooling?
- Where are the underlying methods documented?
Where to go next
- Air properties calculator: Live tool for dry-air properties
- Fluid mechanics curriculum: Theory behind pipe-flow and similarity problems
- Dimensionless groups reference: Re, Ma, Nu lookup and checklists
- Instrumentation theme: If sizing pneumatic probe experiments
- Author: Lucas Rey, aerothermal engineer · ORCID · Publications · About
- Focus: Interactive engineering utilities and reproducible data-reduction workflows
- Live tools: Thermophysical properties of dry air (temperature and pressure dependent)
- Used in: Viscous flow problems, experimental sizing, CFD boundary-condition checks, and curriculum modules
- Research context: Correlations underpin publications, project feasibility studies, and instrumentation sizing workflows
Available tools
Pipe flow calculator
Reynolds number, flow regime, Darcy friction factor from Colebrook-White, pressure drop, head loss and wall shear stress for a full circular pipe. The friction factor was checked against published Moody values before the tool was published, and the page carries that comparison. It pairs with the air properties calculator, which returns the density and viscosity it asks for, and with the viscous flow problem set.
Air properties calculator
Computes thermophysical properties of dry air as a function of local temperature and pressure. Used in practice for ECAT facility operating-point checks on the HPT deterioration programme, nondimensional similarity work in the fluid mechanics curriculum (developed while teaching in Barcelona), and AM heat-exchanger low-order sizing behind the 2024 Engineering Research Express paper.
Related on this site
- CFD-experiment validation: how property inputs enter simulation validation
- Experimental aerothermal measurement: long-form methods article
- Fluid mechanics curriculum: modules and problem sets that use these tools
- 3-hole probe uncertainty note: methods behind planned probe utilities
- Instrumentation & measurement: thematic index for calibration and uncertainty workflows
- Turbomachinery deterioration: HPT research using thermophysical property lookups
- Publications: peer-reviewed research underpinning correlations
- Projects: experimental campaigns and CFD studies
- Professional programs: corporate workshops, technical review, and advisory
- Teaching hub: structured learning paths using calculators
- HPT transient thermography note: thermography data-reduction methods
- Articles: long-form methods and admissions writing
- Aerothermal engineering methods: cross-cutting experiment and validation cluster
- Ventures: field validation context for calculator use
- Engineering hub: full platform index
Tool roadmap
Additional modules are registered in the engineering catalogue as internal workflows are formalised into public tools.
Probe uncertainty (planned)
Bias propagation for multi-hole pneumatic probes, methods on the instrumentation & measurement thematic index and in the 3-hole probe uncertainty note.
Heat-exchanger screening (planned)
NTU-effectiveness and low-order sizing for compact AM heat exchangers, methods in the low-order models note and thermal theme.
Planned tools are registered in the engineering catalogue and listed honestly here until shipped, see also the instrumentation theme for probe-uncertainty work.
Workshops, technical review, consulting, research partnerships, teaching: if any of it is close to what you are doing, I would enjoy hearing about it. The professional programmes set out what each one involves.
Part of
This page sits within the broader knowledge structure on lucasrey.com:
- Engineering - Central knowledge platform - tools, curriculum, notes, and research assets.
- Tools - Interactive calculators and engineering utilities.
Connected work
Related content from the same research and engineering work:
- Air properties calculator
- Curriculum modules
- Practice problems
- Methods and correlations
- Engineering calculators - Referenced from Engineering
- Engineering calculators - Referenced from Problem-solving procedures
- Calculation tools - Referenced from Viscous flow
Part of Engineering
This page is part of the engineering knowledge platform on lucasrey.com.
- Engineering hub - Full knowledge platform index
- Air properties calculator - Dry-air thermophysical properties - density, viscosity, conductivity, and specific heats for aerothermal sizing (200 to 2000 K).
- Pipe flow calculator - Reynolds number, Colebrook friction factor, Darcy-Weisbach pressure drop, head loss and wall shear stress for a full circular pipe.
- Air properties calculator - Dry-air thermophysical properties - density, viscosity, conductivity, and specific heats for aerothermal sizing (200 to 2000 K).
- Fluid mechanics curriculum - Index and learning path across modules.
- Engineering notes - Reference material and methods documentation - instrumentation and turbomachinery clusters.
- Publications - Peer-reviewed papers and manuscripts in preparation - research pillar with thematic hubs, project links, and structured metadata.
- Projects - Selected engineering projects and outcomes.
- Viscous flow - problems - Worked and practice problems for viscous flow.
- 3-hole probe uncertainty - Uncertainty propagation for multi-hole pneumatic probes.
- Experimental aerothermal measurement - Methods article on traceability, similarity, and facility transfer - links instrumentation, curriculum, and tools.
- teaching
- Air properties calculator
- Curriculum modules
- Practice problems
Engineering knowledge platform
More tools, curriculum, notes, and research from the same body of work:
- Engineering - Central knowledge platform - tools, curriculum, notes, research, and applied engineering work.
- Teaching - University STEM support, admissions guidance, and quantitative reasoning - engineering-informed teaching.
Where to go from here
Everything on this site is free to read. These are the things worth doing next.
- Find out where you actually stand - Fifteen questions, twenty minutes, scored instantly, with a worked solution for every one you miss
- Work a practice set at full paper depth - Ten sets of five questions, two in every module, each one worked in full
- See what can actually be checked about this tutor - What is published, counted from the pages themselves, and the credentials behind it
- Enquire about one-to-one preparation - For candidates who want the gap closed rather than mapped. Places are limited and taken by application
Everything linked above is free and stays free. One-to-one places are limited and taken by application, not by the hour.