Body mixing decomposition reactor

An exhaust aftertreatment assembly comprising:

• a doser;
• and
• a cone having a first center axis and being defined by a first length along the first center axis, the cone comprising:
• a first sidewall having a plurality of inlets,
• a plurality of flaps, each of the flaps extending radially outward from the first sidewall over one of the inlets,
• a first cone opening at a first end of the first sidewall, and
• a second cone opening at a second end of the first sidewall;
• a tube having a second center axis that is coincident with the first center axis, the tube comprising:
• a second sidewall having a second length along the second center axis, the second length greater than the first length, the second sidewall being cylindrical and unperforated,
• a first tube opening at a first end of the second sidewall, and
• a second tube opening at a second end of the second sidewall;
• and
• a flange in confronting relation with and orthogonal to the second sidewall, the flange extending outwardly from and around the second sidewall at a location adjacent to the first tube opening and the second cone opening;
• wherein:
• the first cone opening is adjacent to a portion of the doser;
• the first cone opening has a first diameter;
• the second cone opening is adjacent to the first tube opening and has a second diameter, the second diameter being larger than the first diameter;
• and
• the first sidewall has a conical shape.