Temperature gradient —drives→ Advective heat transport

Conditions

• a bulk fluid flow connects the hotter and colder regions
• for forced circulation the flow may be supplied by an external pump rather than generated by buoyancy

Evidence · 3

1. [1]
   A. Bejan. Advanced Engineering Thermodynamics (4th ed.) (2016)

   Wiley · doi:10.1002/9781119245964 · crossref ✓ 2026-09-19 · record
2. [2]
   U.S. Nuclear Regulatory Commission. Pressurized Water Reactors — how a typical commercial PWR works (2025)

   nrc.gov · www.nrc.gov/reactors/power/pwrs · record
3. [3]
   U.S. Department of Energy. DOE Fundamentals Handbook: Thermodynamics, Heat Transfer, and Fluid Flow, Volume 2 of 3 (DOE-HDBK-1012/2-92) (1992)

   DOE-HDBK-1012/2-92, June 1992 · www.energy.gov/sites/default/files/2026-04/DOE-HDBK-1012-92_VOL2.pdf · record

Uses of this claim

• Forced-circulation heat-delivery loopcommercial · 3 steps
• PWR primary heat deliverycommercial · 5 steps

• Chemical potential difference → Combustion → Temperature gradient → Advective heat transport → Heat flow → Useful heat5/5 established · extends a recorded pathway
• Electric potential difference → Peltier effect → Temperature gradient → Advective heat transport → Heat flow → Useful heat5/5 established · extends a recorded pathway
• Electric potential difference → Ettingshausen effect → Temperature gradient → Advective heat transport → Heat flow → Useful heat5/5 established · extends a recorded pathway
• Incident radiation flux → Photothermal absorption → Temperature gradient → Advective heat transport → Heat flow → Useful heat5/5 established · extends a recorded pathway
• Radiative imbalance with the sky → Radiative sky cooling → Temperature gradient → Advective heat transport → Heat flow → Useful heat5/5 established · extends a recorded pathway
• Nuclear binding-energy difference → Nuclear fusion → Temperature gradient → Advective heat transport → Heat flow → Useful heat3/5 established · extends a recorded pathway
• Nuclear binding-energy difference → Radioactive decay → Beta particles → Radioisotope heating → Temperature gradient → Advective heat transport → Heat flow → Useful heat7/7 established · extends a recorded pathway
• Nuclear binding-energy difference → Radioactive decay → Alpha particles → Radioisotope heating → Temperature gradient → Advective heat transport → Heat flow → Useful heat7/7 established · extends a recorded pathway

Cite this claim

Physical Transformation Atlas (2026). claim claim:temperature-drives-advective-heat-transport: Temperature gradient —drives→ Advective heat transport. Dataset revision rbfbfcbb70e57 (hash of the canonical data). https://physical-transformation-atlas.wldud5192.workers.dev/claim/temperature-drives-advective-heat-transport

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