agraph setGraphType(LogaritmicLogaritmic); setViewport(750,500,70); setGraphArea(2,1,1,3); setGridandTicks(1,1,1,1); setLabelsandTitle(BottomLeft,"Grain diameter in mm","Settling velocity in mm/sec","Terminal settling velocity"); setLegend(50,"horizontal",10,4,4); setShowCoordinates(false); initPicture(); drawGraphArea(); setPen(2,"green"); plot("Budryck(x)",2,1); drawLegendItem(2,"Budryck","rect"); setPen(2,"blue"); plot("Rittinger(x)",2,1); drawLegendItem(3,"Rittinger","rect"); setPen(2,"red"); plot("Stokes(x)",2,1); drawLegendItem(1,"Stokes","rect"); setPen(2,"black"); plot("TSV(x)",2,1); drawLegendItem(4,"Theoretical","rect"); legendBorder(2,"white"); axesBorder("2","black"); viewportBorder("3","black"); endagraphPointer coordinates: (x,y) Click coordinates: (x,y) agraph setGraphType(LogaritmicLogaritmic); setViewport(750,500,70); setGraphArea(2,1,4,4); setGridandTicks(1,1,1,1); setLabelsandTitle(BottomLeft,"Grain diameter in mm","Reynolds number","Reynolds number vs grain diameter"); initPicture(); drawGraphArea(); setPen(2,"green"); plot("Rep(x)",2,1); axesBorder("2","black"); viewportBorder("3","black"); endagraph agraph setGraphType(LogaritmicLogaritmic); setViewport(750,500,70); setGraphArea(4,5,1,5); setGridandTicks(1,1,1,1); setLabelsandTitle(BottomLeft,"Reynolds number","Drag coefficient","Drag coefficient vs Reynolds number"); initPicture(); drawGraphArea(); setPen(2,"green"); plot("Cdp(x)",4,5); axesBorder("2","black"); viewportBorder("3","black"); endagraph 


Settling velocity equations:
Theoretical: `tsv` in m/sec, shape coefficient `psi=0.7` for normal sand
Drag coefficient: `cdp` C_{d} value according to Turton & Levenspiel
Experimental:
Stokes: `Stokes` in mm/sec, for laminar flow with d<0.1 mm
Budryck: `Budryck` in mm/sec, transition zone with 0.1 mm<d<1 mm
Rittinger: `Rittinger` in mm/sec, for turbulent flow with d>1 mm
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