From b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b Mon Sep 17 00:00:00 2001
From: priyanka
Date: Wed, 24 Jun 2015 15:03:17 +0530
Subject: initial commit / add all books

---
 858/CH4/EX4.22/example_22.sce | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100755 858/CH4/EX4.22/example_22.sce

(limited to '858/CH4/EX4.22')

diff --git a/858/CH4/EX4.22/example_22.sce b/858/CH4/EX4.22/example_22.sce
new file mode 100755
index 000000000..8508ea21f
--- /dev/null
+++ b/858/CH4/EX4.22/example_22.sce
@@ -0,0 +1,29 @@
+clc
+clear 
+printf("example 4.22 page number 163\n\n")
+
+//to find minimum fluidization velocity
+
+d=120*10^-6    //in m
+density=2500   //particle density in kg/m3
+e_min=0.45;
+density_water=1000   //in kg/m3
+viscosity=0.9*10^-3;   //in Pa-s
+umf=(d^2*(density-density_water)*9.8*e_min^3)/(150*viscosity*(1-e_min));
+printf("minimum fludization velocity = %f m/s",umf)
+
+Re_mf=(d*umf*density_water)/(viscosity*(1-e_min));
+
+
+//given that uo/umf=10
+function[f] = F(e)
+    f = e^3+1.657*e-1.675;
+endfunction
+
+//initial guess
+x = 10;
+e = fsolve(x,F);
+
+printf("\n\ne = %f",e)
+length_ratio=(1-e_min)/(1-e);
+printf("\n\nratio of heights = %f",length_ratio)
-- 
cgit