Fig. 1 Working mechanism of the proposed EHD seal: ( a ) cold condition and ( b ) operating condition More about this image found in Working mechanism of the proposed EHD seal: ( a ) cold condition and ( b ) ...

Fig. 2 Flowchart to solve the flow equations in the clearance using the prediction–correction algorithm More about this image found in Flowchart to solve the flow equations in the clearance using the prediction...

Fig. 3 Flowchart to solve the flow equations for a given working pressure of P0 using the parametric sweep More about this image found in Flowchart to solve the flow equations for a given working pressure of P0 us...

Fig. 4 Schematic of PINN to solve the flow equation inside the clearance More about this image found in Schematic of PINN to solve the flow equation inside the clearance

Fig. 5 Training of PINN to solve the pressure field and flowrate in the clearance More about this image found in Training of PINN to solve the pressure field and flowrate in the clearance

Fig. 6 Percentage RMS error in the L o s s d p ¯ for 200 simulations with working pressure between 0.2 MPa and 20 MPa More about this image found in Percentage RMS error in the L o s s d p ¯ for 200 sim...

Fig. 7 Percentage RMS loss in the pressure boundary condition at the outlet ( Loss BC2 ) More about this image found in Percentage RMS loss in the pressure boundary condition at the outlet ( Loss...

Fig. 8 Comparison of the predicted pressure field along the clearance using the PINN and PC method More about this image found in Comparison of the predicted pressure field along the clearance using the PI...

Fig. 9 Comparison of the clearance thickness obtained using the PINN and PC method More about this image found in Comparison of the clearance thickness obtained using the PINN and PC method...

Fig. 10 Comparison of the leakage rate as a function of working pressure More about this image found in Comparison of the leakage rate as a function of working pressure

Fig. 1 Parametrized model of an SPT receiver tube with internal fins More about this image found in Parametrized model of an SPT receiver tube with internal fins

Fig. 2 Thermal boundary conditions of a tube cross section More about this image found in Thermal boundary conditions of a tube cross section

Fig. 3 Pressure drop Δ P 5 D i in the last five diameters of the finned segment More about this image found in Pressure drop Δ P 5 D i in the last five diameters of the...

Fig. 4 Candidate fin designs: ( a ) continuous helical fin design, ( b ) interrupted helical fin design, ( c ) multi-head helical fin design, ( d ) wedge-shaped double helix design, and ( e ) helical tape design More about this image found in Candidate fin designs: ( a ) continuous helical fin design, ( b ) interrupt...

Fig. 5 Helical fin design: ( a ) Nusselt number ratio, ( b ) friction factor ratio, and ( c ) temperature leveling effect More about this image found in Helical fin design: ( a ) Nusselt number ratio, ( b ) friction factor ratio...

Fig. 6 Interrupted helical fin design: ( a ) Nusselt number ratio, ( b ) friction factor ratio, and ( c ) temperature leveling effect More about this image found in Interrupted helical fin design: ( a ) Nusselt number ratio, ( b ) friction ...