Thermal Contact Resistance: al_al_bolted_M8 to al_al_ground_1p5MPa
Thermal contact resistance and conductance for material interfaces — bolted joints, pressed contacts, greased interfaces, thermal pads, and bare metal-to-metal contacts
| contact id | conductance W m2K (W/m2K) | contact pressure MPa (MPa) | contact resistance m2KW (m2K/W) | environment | interface material | material 1 | material 2 | notes | surface finish | temperature C (C) |
|---|---|---|---|---|---|---|---|---|---|---|
| al_al_bolted_M8 | 5,000 | 1 | 0.0002 | air | none | aluminum | aluminum | Aluminum-aluminum bolted joint (M8 bolt); Al softer so better contact than steel pair | as-machined | 20 |
| al_al_grease_1MPa | 5,000 | 1 | 0.0002 | air | thermal_grease | aluminum | aluminum | Aluminum joint with standard thermal grease (k~1 W/mK); grease fills surface voids | ground | 25 |
| al_al_grease_hiperf_1MPa | 20,000 | 1 | 0.00005 | air | high_performance_thermal_grease | aluminum | aluminum | Aluminum joint with high-performance thermal grease (k~4-8 W/mK, e.g. Arctic Silver); modern compound | ground | 25 |
| al_al_ground_1atm_10um | 3,640 | 0.1 | 0.000275 | air | none | aluminum | aluminum | Al plates; surface roughness ~10 µm; 1 atm (≈0.1 MPa) interface pressure | ground | 20 |
| al_al_ground_1p5MPa | 11,400 | 1.5 | 0.000088 | air | none | aluminum | aluminum | Al 2024-T3 or similar; ground surface; representative of 1.2-2.5 MPa range | ground | 20 |
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