Help on Line
note: if You are searching about iOS 10 or earlier versions iDrawlix Mobile Help on Line web guide, please click here.
As one can see, within each cross section of iDrawlix® Mobile, Users can choose two different roughness coefficients. One for the bottom and one for the sides. That can be useful in order to characterise two real different material composing any cross section, or conversely, to model the correct behavior of the cross section bottom in two different stages of his life cycle.
Indeed, is well known that with the time, the roughness coefficient characterising a certain material, can vary severely, assuming values sensibly far from his initial ones.
Furthermore, especially for sewers, it happens that the presence of sediments, due to the lack of self cleanising velocity, impose the necessity to have a correct model, in order to forecast the most real possible behavior of a certain sewer branch.
1: leads to the iDrawlix® Mobile In App Purchases Showcase View.
2: leads to this help page.
3: vertical showcase of cross sections, as they appears within the gallery shown above.
1: Read here Your current Level.
2: Full Unlock forever - in App Option: Buy ONCE and you will get forever (NO SUBSCRIPTIONS) your iDrawlix Mobile copy FULL UNLOCKED. No more Watermarks on your drawings. Furthermore, you'll be able to export and save on Your device all the drawings and all the tables generated within iDrawlix Mobile.
3: Watermarks Unlock forever - in App Option: Buy ONCE and you will get forever (NO SUBSCRIPTIONS) your iDrawlix Mobile copy without Watermarks covering your drawings.
1: Main options Menu. See further.
2: Roughness Coefficients Buttons. Tapping on, leads to the Roughness List of proposed coefficients. See Further.
3: Playground button. Once all geometry params are set, leads to the Playground View.
4: Geometric parameters edit area.
Main options Menu
Four calculation models are available:
(GS) Gaukler & Strikler;
(CB) Chezy - Bazin;
(CK) Chezy - Kutter;
User can select:
(IS) International System or
(IU) Imperial Units.
Note how the title bar remember to the User the active options, showing the acronym as above.
Roughness coefficient list
1: Stage Discharge Button. Tapping on, leads to the Stage Discharge View. See further.
2: HGL - Hydraulic Grade Line. Tapping on, leads to the Hydraulic Grade Line View. See further.
3: Geometry Area. Display current geometric characteristics.
4: Playground Area. According with the current geometric characteristics, this area shows the max flow which the current cross section is able to carry downstream, coupled with the corresponding depth, under normal conditions.
Sliding the cursor, User can immediately perceive how the flow varies within the chosen cross section. Computed Normal depth (yn) as well as Normal Flow (Qn) are also displayed numerically.
5: Share/Export Graph Button. User can save the current image shown.
6: Share/Export Table Button. User can save the current geometric characteristics as a table readably with any spreadsheet as Excel or Sheets.
Stage Discharge View
1: Stage Discharge Graph. For the current cross section it is plotted the dimensionless plot well known as Stage Discharge graph representing how all the main geometrical and hydraulic parameters varies with the depth, under the normal flow hypothesis. See further.
2: Geometry Area. Display current geometric characteristics.
3: Table Area. All the parameters plotted within the Stage Discharge graph, are represented also in the tabular format. See further.
4: Share/Export Graph Button. User can save the current Stage Discharge graph.
5: Share/Export Table Button. User can save the parameters plotted within the Stage Discharge graph as a table readably with any spreadsheet as Excel or Sheets.
Hydraulic Grade Line View
1: HGL-Hydraulic Grade Line Plot. For the current cross section, assuming the Flow imposed within the Playground View, it is plotted the graph well known as HGL - Hydraulic Grade Line, under hypothesis of gradually varied flow. The channel is assumed of semidefinite length and the boundary condition is imposed interactively by the User, within the slider 4:
- downstream, for Mild Slope channels;
- upstream, for Steep Slope channels.
In this way, iDrawlix Mobile can integrate any profile known in hydraulics as M1 and M2 for mild slope channels and S2 and S3 for steep slope channel. See further.
2: Geometry Area. Display currents geometric characteristics.
3: Table Area. All the parameters computed within the integration used in order to plot the HGL graph, are represented also in the tabular format as follows:
- Y(i) depth of the current. Dimensions: (m) or (ft);
- X(i) abscissa corresponding to Y(i), computed as negative for upstream wise case (mild slope) and positive for downstream wise integrations (steep slope). Dimensions: (m) or (ft);
- V(i) velocity of the current characterising the cross section i. Dimensions: (m/s) or (ft/s);
- J(i) energy loss or gain between the i-th and the i+1-th cross section. Dimensions: (m/m) or (ft/ft);
- E(i) energy computed as sum of the hydraulic grade and velocity head. Dimensions: (m) or (ft).
5: Share/Export Graph Button. User can save the current HGL graph.
6: Share/Export Table Button. User can save the parameters plotted within the HGL graph as a table readably with any spreadsheet as Excel or Sheets.