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Commit c13f2ab5 authored by Akhil Gunda's avatar Akhil Gunda
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changes made to modify porosity estimation

parent 0b229d08
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...@@ -117,10 +117,11 @@ class HeatPipe: ...@@ -117,10 +117,11 @@ class HeatPipe:
# Number of struts per unit cell (4 diagonal + 12 edge struts / 4 shared) # Number of struts per unit cell (4 diagonal + 12 edge struts / 4 shared)
n_struts_diagonal = 4 n_struts_diagonal = 4
n_struts_edge = 12/4 n_struts_edge = 0
# Volume of struts # Volume of struts, corrected using Chenling's formula
V_strut_diagonal = math.pi * (strut_diameter/2)**2 * l_diagonal # V_strut_diagonal = math.pi * (strut_diameter/2)**2 * l_diagonal
V_strut_diagonal = math.sqrt(3) * strut_diameter**2 * (math.pi * unit_cell_size - 2 * math.sqrt(2) * strut_diameter)
V_strut_edge = math.pi * (strut_diameter/2)**2 * unit_cell_size V_strut_edge = math.pi * (strut_diameter/2)**2 * unit_cell_size
# Total volume of solid material in unit cell # Total volume of solid material in unit cell
...@@ -133,6 +134,7 @@ class HeatPipe: ...@@ -133,6 +134,7 @@ class HeatPipe:
# Specific surface area for BCC lattice # Specific surface area for BCC lattice
surface_area = (n_struts_diagonal * math.pi * strut_diameter * l_diagonal + surface_area = (n_struts_diagonal * math.pi * strut_diameter * l_diagonal +
n_struts_edge * math.pi * strut_diameter * unit_cell_size) n_struts_edge * math.pi * strut_diameter * unit_cell_size)
# surface_area = n_struts_diagonal * math.pi * strut_diameter * l_diagonal
specific_surface = surface_area / V_unit_cell specific_surface = surface_area / V_unit_cell
# Kozeny constant for BCC lattice (typical range 4.5-5.5, is this correct? I also saw this can be 2-3) # Kozeny constant for BCC lattice (typical range 4.5-5.5, is this correct? I also saw this can be 2-3)
...@@ -143,7 +145,8 @@ class HeatPipe: ...@@ -143,7 +145,8 @@ class HeatPipe:
# Calculate effective thermal conductivity using Maxwell's model # Calculate effective thermal conductivity using Maxwell's model
# Assuming copper as base material and water as fluid # Assuming copper as base material and water as fluid
k_fluid = self.fluid_properties["water"]["thermal_conductivity"] fluid_properties = self.get_water_properties(operating_temp, quality=0)
k_fluid = fluid_properties["thermal_conductivity"]
k_solid = material_conductivity k_solid = material_conductivity
volume_fraction = 1 - porosity volume_fraction = 1 - porosity
......
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