Pool boiling heat transfer of open-celled metal foams with V-shaped grooves for high pore densities

•V-shaped groove effect on metal foam pool boiling heat transfer is investigated experimentally.•Groove effect depends on its width, number, distribution, foam material and pore density.•The CHF could be delayed by the V-shaped grooved metal foams.

Pool boiling heat transfer of open-celled metal foam with V-shaped grooves for high pore densities has been investigated experimentally at atmospheric pressure in saturated deionized water. The foam materials are copper and nickel. The pore densities are 80 PPI, 100 PPI and 130 PPI, while the porosity and foam thickness remain the fixed values of 0.95 and 4 mm, respectively. The V-shaped grooves distributions are single-directional and crossing. The parametric study is performed by varying groove width and number. In the present study, the maximum heat flux is 1.47 × 106 W m−2. Boiling patterns on foam surfaces are captured by a high speed camera. The results show that V-shaped groove significantly influences the pool boiling heat transfer performance of metal foam. Grooves’ effect heavily depends on their width, number, distribution and foam material, pore density.