Parametric study on particle size and SOF effects on EGR cooler fouling

► We evaluated the effects of PM on EGR cooler fouling. ► A soot generator and n-dodecane were used where mean particle size and concentration of soot particles could be controlled. ► The deposition and the performance degradation were inversely proportional to particle size. ► The n-dodecane injection reduced the overall thermal conductivity of the EGR cooler. ► This result showed that 'wet soot' caused greater contamination of the EGR cooler.