▁a ▁Fellow ▁of ▁the ▁American ▁Institute ▁of ▁Aer onaut ics ▁and ▁A str onaut ics , ▁and ▁he ▁was ▁also ▁elected ▁an ▁Honor ary ▁Fellow ▁of ▁Tr inity ▁Hall , ▁Cambridge . ▁In ▁ 1 9 9 3 , ▁he ▁was ▁selected ▁to ▁receive ▁the ▁American ▁Institute ▁of ▁Aer onaut ics ▁and ▁A str onaut ics ▁Fl uid ▁Dynam ics ▁Award ▁in ▁recognition ▁of ▁numerous ▁contributions ▁to ▁computational ▁fluid ▁dynamics ▁and ▁the ▁development ▁of ▁many ▁widely ▁used ▁computer ▁programs ▁which ▁have ▁im me as ur ably ▁improved ▁the ▁cap ability ▁to ▁analy se ▁and ▁understand ▁complex ▁flows . ▁In ▁ 1 9 9 5 ▁he ▁was ▁elected ▁a ▁Fellow ▁of ▁the ▁Royal ▁Society ▁of ▁London ▁for ▁Im pro ving ▁Natural ▁Know ledge . ▁In ▁ 1 9 9 5 , ▁he ▁was ▁selected ▁by ▁AS ME ▁to ▁receive ▁The ▁Spirit ▁of ▁St . ▁Louis ▁Medal ▁for ▁numerous ▁out standing ▁contributions ▁to ▁computational ▁fluid ▁dynamics ▁and ▁the ▁development ▁of ▁many ▁widely ▁used ▁computer ▁programs ▁that ▁have ▁im me as ur ably ▁improved ▁understanding ▁of ▁complex ▁flow ▁fields ▁and ▁become ▁a ▁dominant ▁tool ▁for ▁aer od ynamic ▁design . ▁In ▁ 1 9 9 6 ▁he ▁was ▁selected ▁to ▁receive ▁the ▁The od ors en ▁L ect ures hip ▁Award ▁from ▁I CASE / N AS A , ▁Lang ley . ▁In ▁ 1 9 9 7 ▁he ▁was ▁elected ▁as ▁a ▁Foreign ▁Associ ate ▁to ▁the ▁National ▁Academy ▁of ▁Engineering . ▁In ▁ 2 0 0 1 ▁he ▁received ▁the ▁degree ▁Do ct eur