Options Dialog

• Show net air flow – Arrows shown will be the difference between inward and outward air flow. Thus a surface may have an inward (blue) arrow or an outward (red) arrow, but never both.
• Show flow as speed – Arrows will scale to calculated air speed instead of mass flow rate. This calculation takes into account the amount of air moved, the area of the surface (including the aperture opening amount) and an assumed air density of 1.21kg/m². The arrows will be drawn to the same scale as the wind arrows.
• Arrow scale - Scale all flow and wind arrows as desired.
• Arrow position – Defines where the arrows are drawn in relation to their surface.
• Show wind rose – Displays a wind rose under the model based on the weather in the file.
• Offset wind rose – Expands the wind rose to start from the outside of the compass rose.
• Show current sun position – Draw a representation of the sun at the angle corresponding to the date and hour currently selected.
• Show shading sun position – Draw a representation of the sun at the angle corresponding to the corresponding shading hour on the nearest shading day to your current day/hour selection. If you have Show current sun arc checked, an extra arc will be shown for the shading day used. See below for more details.
• Show sun arcs – Draw lines showing the position of the sun for several days throughout the year. A line is drawn for the 21st day of each month. Days after the winter solstice, up to and including the summer solstice, will be shown as dotted lines.
• Show analemmas – Draw lines showing the position of the sun throughout the year for each hour of the day. Days after the winter solstice, up to and including the summer solstice, will be shown as dotted lines.
• Show current sun arc – Draw the currently selected day’s sun arc.
• Show current analemma– Draw the currently selected hour’s analemma.
• Draw sun data below horizon – Draw sun arcs, analemmas and the sun position even where the sun is lower than 2.5° (or 0.2° if the building’s Terrain Type is Flat Profile). Below this angle the lines will be grey and the sun will be shown as dark orange.
• Draw sky dome – Draw a dome of lines around the building at the same distance as the sun arcs.
• Show solar map – Areas of the sky dome around the model are coloured according to the amount of direct radiation that originates from their respective angle. Purple denotes low values, rising to yellow for high values.

Flow Arrows