Numerical Study of Heat Transfer in Trefoil Buried Cable with Fluidized Thermal Backfill and Laying Parameter Optimization

Table 3

Computational results with different meshes.

Grid	Region	Minimum length of grid element [mm]	Maximum length of grid element [mm]	Total element number	[K]	[W]
Grid 1	Zone 1	1.5	0.4	10228	326.56	68.899
	Zone 2	1.5	0.4
	Zone 3	1.5	0.5
Grid 2	Zone 1	0.4	0.2	16337	329.557	69.892
	Zone 2	1.5	0.4
	Zone 3	1.5	0.4
Grid 3	Zone 1	0.3	0.1	19346	329.563	68.903
	Zone 2	0.3	0.1
	Zone 3	0.4	0.2
Grid 4	Zone 1	0.3	0.1	28394	329.563	68.903
	Zone 2	0.3	0.1
	Zone 3	0.35	0.15