Numerical Study on the Enhanced Thermal Performance of the Porous Media-Assisted Flat-Plate Solar Collector

Table 2

Comparisons of the overall Nusselt number () and friction factor () in the FPSC channel by inserting porous blocks with various shapes, inserting number, and Darcy number.

Shape
		REC	10^-5	4.07	4.40	4.53	6.9363	8.6601	8.2559
REC	10^-4	4.18	4.70	4.87	6.4360	8.0578	7.6361
REC	10^-3	4.26	4.78	5.57	4.9605	6.1369	5.8247
REC	10^-2	4.93	5.91	6.01	2.6120	3.0223	2.8675
TRA1	10^-5	3.76	3.86	3.94	5.3098	6.4035	6.1475
TRA1	10^-4	3.79	3.94	4.05	5.0271	6.0459	5.8046
TRA1	10^-3	3.93	4.26	4.40	4.0619	4.8150	4.6141
TRA1	10^-2	4.40	5.17	5.23	2.4643	2.7774	2.6487
TRA2	10^-5	3.36	3.69	3.89	4.7994	5.2588	4.4086
TRA2	10^-4	3.42	3.80	3.91	4.3740	4.9225	4.2012
TRA2	10^-3	3.52	3.91	4.06	3.8562	4.1861	3.4781
TRA2	10^-2	3.82	4.48	4.73	2.3591	2.6361	2.2232
TRI	10^-5	3.11	3.40	3.62	3.4842	3.5822	2.7667
TRI	10^-4	3.15	3.46	3.64	3.2855	3.4914	2.6963
TRI	10^-3	3.29	3.72	3.88	2.8619	3.0688	2.4105
TRI	10^-2	3.61	4.25	4.49	2.1386	2.4819	1.8263
Nonporous channel	—	2.98			0.99