Kevrekidis Mech Model 1998

Kevrekidis Mech Model 1998 - P a r t i c l e R e s u s p e...

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Unformatted text preview: P a r t i c l e R e s u s p e n s i o n M o d e l 1 A N E W M E C H A N I S T I C M O D E L F O R T H E R E S U S P E N S I O N O F P A R T I C U L A T E M A T T E R P . G . K e v r e k i d i s , M . L a z a r i d i s a n d P . G . G e o r g o p o u l o s 3 r d C R E S P A n n u a l M e e t i n g J u n e , 1 9 9 8 C R E S P / E O H S I E x p o s u r e A s s e s s m e n t T a s k G r o u p E n v i r o n m e n t a l a n d O c c u p a t i o n a l H e a l t h S c i e n c e s I n s t i t u t e a j o i n t p r o j e c t o f U M D N J – R . W . J o h n s o n M e d i c a l S c h o o l a n d R u t g e r s U n i v e r s i t y 1 7 F r e l i n g h u y s e n R o a d , P i s c a t a w a y N e w J e r s e y 8 8 5 4 C R E S P / E O H S I- E x p o s u r e A s s e s s m e n t C o m p u t a t i o n a l C h e m o d y n a m i c s L a b o r a t o r y P a r t i c l e R e s u s p e n s i o n M o d e l 2 A B S T R A C T I n t h i s w o r k w e i n t r o d u c e a n e w m e c h a n i s t i c m o d e l f o r p a r t i c l e r e s u s p e n s i o n t h a t c o u l d e v e n t u a l l y h e l p e l u c i d a t e t h e p r o c e s s e s l e a d i n g t o a t m o s p h e r i c r e s u s p e n s i o n o f c o n t a m i n a t e d s o i l p a r t i c l e s a t s i t e s o f c o n c e r n . P r e v i o u s s t u d i e s o n t h e s u b j e c t h a v e m a i n l y f o c u s e d a t t e n t i o n o n t h e p o s s i b i l i t y o f i n d u c i n g r e s u s p e n s i o n t h r o u g h t h e l i f t f o r c e o f a t u r b u l e n t fl o w . H e r e , w e e x a m i n e t h e e ff e c t o f a f o r c e a c t i n g f r o m a d i s t a n c e a n d e l a s t i c a l l y p r o p a g a t i n g t h r o u g h t h e c r e a t i o n o f b e n d i n g w a v e s o n t h e s u r f a c e . B a s e d o n a f o r c e b a l a n c e a p p r o a c h w e e s t a b l i s h t h e r e l e v a n c e o f t h i s f a c t o r f o r r e a l i s t i c v a l u e s a n d d i s t r i b u t i o n s o f t h e f o r c e o n t h e s u r f a c e b y e x p l i c i t c o m p a r i s o n w i t h t h e a d h e s i v e f o r c e “ b i n d i n g ” t h e p a r t i c l e t o t h e s u r f a c e . O u r c a l c u l a t i o n s d e m o n s t r a t e t h a t f a c t o r s s u c h a s f o r c e s f r o m e x t e r n a l s o u r c e s s h o u l d b e i n c l u d e d i n m o r e d e t a i l e d s t u d i e s o f r e s u s p e n s i o n ( e x p e r i m e n t a l a n d t h e o r e t i c a l ) a n d c a n b e a p p r o p r i a t e l y u t i l i z e d i n o r d e r t o c o n t r o l ( i n d u c e o r a v o i d ) t h i s p h e n o m e n o n . C R E S P / E O H S I- E x p o s u r e A s s e s s m e n t C o m p u t a t i o n a l C h e m o d y n a m i c s L a b o r a t o r y P a r t i c l e R e s u s p e n s i o n M o d e l 3 I N T R O D U C T I O N H y p o t h e s i s • C o n s i d e r t h e f o l l o w i n g i d e a l i z e d s i t u a t i o n i n v o l v i n g a t h i n s u r f a c e o n w h i c h s p h e r- i c a l p a r t i c l e...
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Kevrekidis Mech Model 1998 - P a r t i c l e R e s u s p e...

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