getting-started.md: Renamed file to "getting_started.md" to keep file naming consistent

mkdocs.yml: Changed naming of getting_started.md accordingly

docs/documentation/sizing/tank_design/getting-started.md → docs/documentation/sizing/tank_design/getting_started.md

@@ -12,9 +12,11 @@ This section will guide you through the necessary steps to get the _tank\_design
     It is assumed that you have the `UNICADO package` installed including the executables and UNICADO libraries.
 
 Generally, we use two files to set or configure modules in UNICADO:
+
 - The aircraft exchange file (or _acXML_) includes
     - data related inputs (e.g., required energy, component design data) and
     - data related outputs (e.g., tank positions).
+
 - The module configuration file `tank_design_conf.xml` (also _configXML_) includes
     - control settings (e.g., enable/disable generating plots) and
     - program settings (e.g., information on buffers).
@@ -37,12 +39,26 @@ Thus, it must be ensured that this data is available. More information on requir
 
 ## Aircraft exchange file requirements {#aircraft-exchange-file}
 To single execute the _tank\_design_ module, we need an _acXML_ file that already contains the output data from the following tools:
+
 - _wing\_design_
 - _empennage\_design_
 - _fuselage\_design_
-- _mission\_analysis_ - _tank\_design_ execution also possible without mission analysis data (an assumption is made to calculate mission energy amount)
+- _mission\_analysis_ <sup>*</sup>
+
+<sup>*</sup> The _tank\_design_ execution is also possible without mission analysis data. Alternatively, the following assumption is used to calculate the mission fuel amount:
+
+$
+    m_{fuel} = n_{PAX} \cdot R \cdot \frac{E}{100 \text{ km}}
+$
+
+In which
+
+- $n_{PAX}$ - number of passengers
+- $R$ - range in km
+- $E$  - energy demand (3.35 liter per PAX per 100 km)
 
 The following data should then be available in the _acXML_:
+
 1. Requirements and specifications
     - Design specification
         - Configuration information: Configuration type, tank definition ([see below](#configuring-tank-design-parameters-in-the-aircraft-exchange-file))

mkdocs.yml

@@ -235,7 +235,7 @@ nav:                                      # Customizes the main navigation struc
               - empennage_design/functions.md
           - Tank Design: 
             - Introduction: documentation/sizing/tank_design/index.md
-            - Getting Started: documentation/sizing/tank_design/getting-started.md
+            - Getting Started: documentation/sizing/tank_design/getting_started.md
             - Design Method: documentation/sizing/tank_design/tank_design_method.md
             - Run your First Design: documentation/sizing/tank_design/run_your_first_tank_design.md
             - Software Architecture: documentation/sizing/tank_design/software_architecture.md