1960 बोसोरफोरनि सिगांथिं जेला कुमारआ पिएइसडि खालामदोंमोन, केमिकेल इन्जिनियारिंनि फरायसाफ्रा आन्जादारि खारिनिफ्राय फेंफोनानि बागै सोलोङो जायफोरखौ इन्जिनियारफ्रा बाइदि रोखोमनि रियेक्टर बाहायना सोरजिदोंमोन।
In the early 1960s, when Kumar was doing his PhD, chemical engineering students learned about bubbles from experimental data that engineers had generated using reactors of various sizes.