Exhaust gas aftertreatment mixer

A flow device for exhaust gas aftertreatment, comprising

• a mixing chamber comprising an input side and an output side;
• a divider dividing the mixing chamber to the input side and the output side;
• a mixing tube comprising a first end and a second end, and an intake section for receiving exhaust gas from the input side of the mixing chamber;
• a swirl guide configured to guide the received exhaust gas to flow inside the mixing tube towards the second end as a rotating and advancing main flow;
• and
• a reactant doser mount for a reactant doser;
• wherein
• the divider comprises a first guide between the swirl guide and the output side of the mixing chamber;
• the first guide comprises a concave shape at least on both sides of the swirl guide when seen from the input side of the mixing chamber, the concave shape being configured to form a convex shape form on the output side providing more space on the output side for spreading exhaust gas flow into a next processing phase;
• the mixing tube comprises a dosing section between the intake section and the second end;
• the mixing tube is configured to guide the exhaust gas received by the intake section through the divider towards the second end of the mixing tube;
• the dosing section is configured to receive at least most of the rotating and advancing exhaust gas flow;
• and
• the reactant doser mount is configured for mounting the reactant doser such that when in use, the reactant doser provides reactant to the dosing section.